DOCSLIB.ORG

Sweetwater County, Wyoming -F ^By DOUGLAS M

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Sweetwater County, Wyoming -F ^By DOUGLAS M Sweetwater County, Wyoming -f ^By DOUGLAS M. SHERIDAN, CHARLES H. MAXWELL, and JOHN T. COLLIER ^CONTRIBUTIONS TO THE GEOLOGY OF URANIUM GEOLOGICAL SURVEY BULLETIN 1087-J , Prepared on behalf of the United States Atomic En ergy Co mm iss io n and pub lish ed with the permission of the Commission ' UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1961 UNITED STATES DEPARTMENT OF THE INTERIOR STEWART L. UDALL, Secretary GEOLOGICAL SURVEY Thomas B. Nolan, Director For sale by the Superintendent of Documents, U.S. Government Printing Office Washington 25, D.G. CONTENTS *> Page Abstract______________-----------_-_-___-______--_-____________ 391 A Introduction ___-_----__-_-_--------__-_-_-___---_____-________ _._ 392 Location and accessibility______________________________________ 393 ^ Geography__________________________________________________ 393 Previous work___--____-----------__---__-_-----_--_-___-_-____ 395 Present investigation.._________________________________________ 395 ^ Acknowledgments- _____-_--__-_-_-_-_______-_-_-_-____________ 396 General geology_-_---__----------------_--------_-_-_-----_______, 397 <j Regional geologic setting________________________________________ 397 Stratigraphy..........--.-------.------.--.-------.-.-......'.. 398 ^ Rocks of Paleocene age...------_-_---__----___--_-_--_-____ 400 Fort Union formation._______.__._.____.._._...._____.. 400 "* Rocks of Eocene age.______________________________________ 401 Battle Spring formation ________________________________ 401 Wasatch formation,._.-___.--_-_-_-___-__.-_-___-__-__ 402 Cathedral Bluffs tongue__._._______________________ 402 Green River formation. _-__-_--___---____-__-__-___.___ 404 \ Tipton tongue.----_----------_-------------___--._ 404 Morrow Creek member.____________________________ 407 "* Bridger formation____________________________________ 408 Rocks of Oligocene(?) age.------_--_---_-----_-_-_---_-_-_- 409 * Rocks of Miocene age----_------_--_-__--------_--_----___.. 410 Quaternary deposits.._.-.-____-_----__---___--____-__-___. 410 Source of sediments___-_-_-__--__----__-----___________-___ 412 ' Structure.._ __________________________________________________ 412 Folds._----_------_----------------------------_--_----.- 413 / Faults-.---------------------------.-------------------.. 413 Description of faults._---------_--__---_-----_-_-_--___ 413 * Age of faults------------------------------------------ 417 Relation to regional structure---__-_--_---_-_-___-_--__- 418 ~^ Uranium deposits-___-______-___-_-_-__----____--_-___--__-_-______ 418 Schroeckingerite deposits__-_-__-----------------------_--_---._ 419 Areal distribution._______________________________________ 419 1 Vertical range....__-___-_-_--_--___--___---___.______-__-_ 419 Geologic setting_.__-_-___-___-___-.___-__-._-_._.-.-._._._ 420 *«* ' Shape and size.____._-_-_-_---___-___.-.__________________ 420 Relations to lithologic and structural features-_-___-____----__ 421 ^ Grade-.----..--------------------.----..---.----_----.--- 422 Mineralogy _______________________________________________ 423 Solution and redeposition._.-.-__---_-_.-_-_-.__-___________ 427 Origin...............-_-----_-.-_-.-.------.---_.-.---._.- 428 Deposition of the Schroeckingerite__.--_-----_----__-_-_. 428 A Source of the uranium________________________________ 429 Preferred hypothesis ------------------------------- 429 * Other hypotheses----.--------.---------------.---- 435 Conclusions.. _-_-___-_______-_---_-_---------_--- 438 Reserves.________________________________________________ 438 ' . in IV CONTENTS Uranium deposits Continued Page Other radioactive materials___________________ __-_-.-______ 438 Types_ __________________________________ _____________ 438 Origin ___________________________________ _____________ 440 Uraniferous water._____----__---___-_________ ---__--__.___ , 441 General features of water in Lost Creek area- _____________ 441 Water samples.____-__---___--_---__-______________-______ 441 Interpretation of water analyses._-_-________-_-_-___-_______ 446 Conclusions-______________________________________________ 448 Suggestions for prospecting.________________________________________ 452 Schroeckingerite_ _ ___________________________________________ 452 Hypothetical deposits.____-_.._-___----_____-___--__-__-__-_-___ 454 Literature cited-_______._.__-.-_-_---_----------------__---i----_- 456 Stratigraphic sections in the Lost Creek area__________________________ 459 Index_ ___-____-_-__--__-----_------------------_------_------_--_ 477 ILLUSTKATIONS [All plates are in plate volume] PLATE 35. Index map showing location of the Lost Creek area, Sweetwater County, Wyo. 36. Areal geology of the Lost Creek area. 37. Geologic map and cross sections of the Lost Creek schroeckingerite area and vicinity, Sweetwater County, Wyo. 38. Detailed maps of exploration area. 39. Geologic sections of.trench 1. 40. Geologic sections of trenches 2-7. 41. Geologic sections of trenches 8-13. 42. Graph showing relationship of equivalent uranium to uranium. Page FIGURE 29. Generalized diagram showing the age and intertonguing re­ lationships of formations in the Lost Creek area__________ 399 30. Fossil fish, Mioplosus cf. beani, in brown shale of the Tipton tongue, Green River formation.________________________ 406 31. Typical schroeckingerite of the Lost Creek deposits.________ 425 32. Schroeckingerite associated with gypsum._________________ 426 33. Trilinear diagram showing chemical character of water samples from the Lost Creek area._____________________ 448 34. Trilinear diagram comparing water analyses in the Lost Creek area with those from other areas._________________ 449 CONTENTS TABLES Page ~* TABLE 1. Paleontologio data, Lost Creek area, Sweetwater County, , Wyoming.____________________________________________ 407 2. Comparison of partial analyses of water samples from the Lost -/ Creek area and Red Desert with those of water from other areas.____-_---_--___-_-_____-__________---____-__---_ 450 -v 3. Comparison of water samples taken from the same location at different times, Lost Creek area._________________________ 451 CONTRIBUTIONS TO THE GEOLOGY OF URANIUM GEOLOGY OF THE LOST CREEK SCHROECKINGERITE DEPOSITS, SWEETWATER COUNTY, WYOMING By DOUGLAS M. SHERIDAN, CHARLES H. MAXWELL, and JOHN T. COLLIER ABSTBACT The largest known group of schroeckingerite deposits in the world is located in the Lost Creek area in northern Sweetwater County, Wyo. Schroeckingerite, a hydrated fluo-carbonate-sulfate of sodium, calcium, and uranium, occurs near the surface in caliche-type deposits in an area of about one-half square mile. The Lost Creek schroeckingerite area is on the northeastern edge of the Red Desert and is in the north-central part of the Great Divide Basin, a topographic basin of interior drainage. The entire region is land of low relief with altitudes between 6,000 and 7,000 feet above sea level. The bed- rock of the basin consists of Tertiary formations, but much of it is concealed by Quaternary deposits. Older rocks of Mesozoic and Paleozoic age are exposed only near the margins of the basin. The Tertiary rocks in the Lost Creek area consist of about 5,200 feet of sandstone, siltstone, claystone, and shale; coal beds and volcanic effusive ma­ terial are also found in parts of the sequence. The oldest unit, the Fort Union formation of Paleocene age, is overlain unconformably by an intertongu- ing sequence of Eocene sedimentary rocks the Wasatch, Green River, and Battle Spring formations. Overlying the intertongued sequence is the Bridger formation of Eocene age. At the top of the Tertiary sequence are conglomerates of Oligocene(?) age, and conglomerate and tuffaceous sandstone of Miocene age. A northwestward-trending syncline in the Lost Creek area is cut by north- westward- and northeastward-trending sets of faults. The northwestward- trending faults are related to a major fault system that extends for a total distance of about 75 miles. The longest fault in the Lost Creek area, a curving fault along the northern limb of the syncline, has an apparent strati- graphic displacement between 2,500 and 4,000 feet. The southern limb of the syncline is cut by the Cyclone Rim zone of faulting that trends N. 72° W. for at least 14 miles. This zone consists of a complex pattern of faults, but the net stratigraphic displacement at most places along the zone is probably less than 400 feet. Much of the faulting in the Lost Creek area may be Miocene or post-Miocene in age. The area containing schroeckingerite deposits lies east of Lost Creek along the southern limb of the syncline and is partly within and partly north of the Cyclone Rim zone of faulting. The deposits are distributed irregularly within this area, but the depth of occurrence is limited to the level of the ground water. Most of the deposits occur in northward-dipping strata of Eocene age in a zone 2 to 8 feet below the surface of the ground. 391 392 CONTRIBUTIONS TO THE GEOLOGY OF URANIUM Some of the deposits lie partly or wholly within the surflcial material of Quaternary age. Most commonly the schroeckingerite deposits are elongate lenticular bodies that lie subparallel to the surface of the ground, generally across fault planes, bedding planes, and the unconformity at the base of the Quaternary overburden. Other deposits are tabular, branching, or irregular in shape. The average thick­ ness of the deposits is about 1.5 feet. The richest concentrations of schroeckin­ gerite occur in fine-grained host rocks, especially
Load more

Recommended publications
  • 1991 ADMINISTRATION BOARD of DIRECTORS President Dr
    FEB 91 THE GEOLOGICAL NEWSLETTER I GEOLOGICAL SOCIETY OF THE OREGON COUNTRY I .. GEOLOGICAL SOCIETY Non-Profit Org. OF THE OREGON COUNTRY U.S. POSTAGE P.O. BOX 907 PAID Portland, Oregon PORTLAND, OR 97207 Permit No. 999 \ 1Ett£ 13" .\. J!l CIJ" \ \. GEOLOGICAL SOCIETY OF THE OREGON COUNTRY 1990-1991 ADMINISTRATION BOARD OF DIRECTORS President Dr. Ruth Keen 222-1430 Directors 4138 SW 4th Ave Donald Barr (3 years) 246-2785 Portland, OR 97201 Peter E. Baer (2 years) 661-7995 Vice President Charlene Holzwarth (1 year) 284-3444 Dr. Walter Sunderland 625-6840 Immediate Past Presidents 7610 NE Earlwood Rd. Rosemary Kenney 221-0757 Newberg, OR 97132. Joline Robustelli 223-2852 Secretary Cecelia Crater 235-5158 THE GEOLOGICAL NEWSLETTER 3823 SE lOth Editor: Sandra Anderson 775-5538 Portland, OR 97202 Calendar: Joline Robustelli 223-2852 Treasurer Business Mgr. Joline Robustelli 223-2852 Archie Strong 244-1488 Assist: Cecelia Crater 235-5158 6923 SW 2nd Ave Portland, OR 97219 ACTIVITIES CHAIRS Calligrapher Properties and PA System .. Wallace R. McClung 637-3834 (Luncheon) Donald Botteron 245-6251 Field Trips (Evening) Walter A. Sunderland 625-6840 Alta B. Fosback 641-6323 Publications Charlene Holzwarth 284-3444 Margaret Steere 246-1670 Geology Seminars Publicity Margaret Steere 246-1670 Roberta L. Walter 235 -3579 Historian Refreshments Phyllis G. Bonebrake 289-8597 (Friday Evening) Hospitality Donald and Betty Turner 246-3192 (Luncheon) Margaret Fink 289-0188 (Geology Seminars) (Evening) Gale Rankin and Freda and Virgil Scott 771-3646 Manuel Boyes 223-6784 Telephone Library: Frances Rusche 6_54-5975 Cecelia Crater 235-5158 Esther Kennedy -287-3091 Volunteer Speakers Bureau Lois Sato 654-7671 Robert Richmond 282-3817 Past Presidents Panel Annual Banquet Rosemary Kenney 221-0757 Esther Kennedy 287-3091 Programs Gale Rankin 223-6784 (Luncheon) Helen E.
    [Show full text]
  • A Systematic Reappraisal and Quantitative Study of the Non
    Canadian Journal of Earth Sciences A systematic reappraisal and quantitative study of the non- marine teleost fishes from the late Maastrichtian of the Western Interior of North America – evidence from vertebrate microfossil localities Journal: Canadian Journal of Earth Sciences Manuscript ID cjes-2020-0168.R2 Manuscript Type: Article Date Submitted by the 20-Nov-2020 Author: Complete List of Authors: Brinkman, Donald B.; Royal Tyrrell Museum of Palaeontology Divay, Julien; Royal Tyrrell Museum of Palaeontology DeMar, David;Draft National Museum of Natural History Smithsonian Institution, Department of Paleobiology Wilson Mantilla, Gregory P.; University of Washington, Department of Biology; University of Washington, Department of Biology Scollard, Hell Creek, Lance, Cretaceous/Paleogene mass extinction, Keyword: Esocidae, Acanthomorpha Is the invited manuscript for consideration in a Special Tribute to Dale Russell Issue? : © The Author(s) or their Institution(s) Page 1 of 106 Canadian Journal of Earth Sciences 1 1 A systematic reappraisal and quantitative study of the non-marine teleost fishes from the late 2 Maastrichtian of the Western Interior of North America – evidence from vertebrate microfossil 3 localities 4 5 Donald B. Brinkman1*, Julien D. Divay2, David G. DeMar, Jr.3, and Gregory P. Wilson 6 Mantilla4,5 7 8 1Royal Tyrrell Museum of Palaeontology, Box 7500, Drumheller, AB, Canada, T0J 0Y0. 9 [email protected]; and Adjunct professor, Department of Biological Sciences, University 10 of Alberta, Edmonton, Alberta Draft 11 2Royal Tyrrell Museum of Palaeontology, Box 7500, Drumheller, AB, Canada, T0J 0Y0. 12 [email protected] 13 3Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, 14 Washington, DC, 20560, U.S.A.
    [Show full text]
  • Monophyly and Interrelationships of Snook and Barramundi (Centropomidae Sensu Greenwood) and five New Markers for fish Phylogenetics ⇑ Chenhong Li A, , Betancur-R
    Molecular Phylogenetics and Evolution 60 (2011) 463–471 Contents lists available at ScienceDirect Molecular Phylogenetics and Evolution journal homepage: www.elsevier.com/locate/ympev Monophyly and interrelationships of Snook and Barramundi (Centropomidae sensu Greenwood) and five new markers for fish phylogenetics ⇑ Chenhong Li a, , Betancur-R. Ricardo b, Wm. Leo Smith c, Guillermo Ortí b a School of Biological Sciences, University of Nebraska, Lincoln, NE 68588-0118, USA b Department of Biological Sciences, The George Washington University, Washington, DC 200052, USA c The Field Museum, Department of Zoology, Fishes, 1400 South Lake Shore Drive, Chicago, IL 60605, USA article info abstract Article history: Centropomidae as defined by Greenwood (1976) is composed of three genera: Centropomus, Lates, and Received 24 January 2011 Psammoperca. But composition and monophyly of this family have been challenged in subsequent Revised 3 May 2011 morphological studies. In some classifications, Ambassis, Siniperca and Glaucosoma were added to the Accepted 5 May 2011 Centropomidae. In other studies, Lates + Psammoperca were excluded, restricting the family to Available online 12 May 2011 Centropomus. Recent analyses of DNA sequences did not solve the controversy, mainly due to limited taxonomic or character sampling. The present study is based on DNA sequence data from thirteen Keywords: genes (one mitochondrial and twelve nuclear markers) for 57 taxa, representative of all relevant Centropomidae species. Five of the nuclear markers are new for fish phylogenetic studies. The monophyly of Centrop- Lates Psammoperca omidae sensu Greenwood was supported by both maximum likelihood and Bayesian analyses of a Ambassidae concatenated data set (12,888 bp aligned). No support was found for previous morphological hypothe- Niphon spinosus ses suggesting that ambassids are closely allied to the Centropomidae.
    [Show full text]
  • Attachment J Assessment of Existing Paleontologic Data Along with Field Survey Results for the Jonah Field
    Attachment J Assessment of Existing Paleontologic Data Along with Field Survey Results for the Jonah Field June 12, 2007 ABSTRACT This is compilation of a technical analysis of existing paleontological data and a limited, selective paleontological field survey of the geologic bedrock formations that will be impacted on Federal lands by construction associated with energy development in the Jonah Field, Sublette County, Wyoming. The field survey was done on approximately 20% of the field, primarily where good bedrock was exposed or where there were existing, debris piles from recent construction. Some potentially rich areas were inaccessible due to biological restrictions. Heavily vegetated areas were not examined. All locality data are compiled in the separate confidential appendix D. Uinta Paleontological Associates Inc. was contracted to do this work through EnCana Oil & Gas Inc. In addition BP and Ultra Resources are partners in this project as they also have holdings in the Jonah Field. For this project, we reviewed a variety of geologic maps for the area (approximately 47 sections); none of maps have a scale better than 1:100,000. The Wyoming 1:500,000 geology map (Love and Christiansen, 1985) reveals two Eocene geologic formations with four members mapped within or near the Jonah Field (Wasatch – Alkali Creek and Main Body; Green River – Laney and Wilkins Peak members). In addition, Winterfeld’s 1997 paleontology report for the proposed Jonah Field II Project was reviewed carefully. After considerable review of the literature and museum data, it became obvious that the portion of the mapped Alkali Creek Member in the Jonah Field is probably misinterpreted.
    [Show full text]
  • A Review of the Systematic Biology of Fossil and Living Bony-Tongue Fishes, Osteoglossomorpha (Actinopterygii: Teleostei)
    Neotropical Ichthyology, 16(3): e180031, 2018 Journal homepage: www.scielo.br/ni DOI: 10.1590/1982-0224-20180031 Published online: 11 October 2018 (ISSN 1982-0224) Copyright © 2018 Sociedade Brasileira de Ictiologia Printed: 30 September 2018 (ISSN 1679-6225) Review article A review of the systematic biology of fossil and living bony-tongue fishes, Osteoglossomorpha (Actinopterygii: Teleostei) Eric J. Hilton1 and Sébastien Lavoué2,3 The bony-tongue fishes, Osteoglossomorpha, have been the focus of a great deal of morphological, systematic, and evolutio- nary study, due in part to their basal position among extant teleostean fishes. This group includes the mooneyes (Hiodontidae), knifefishes (Notopteridae), the abu (Gymnarchidae), elephantfishes (Mormyridae), arawanas and pirarucu (Osteoglossidae), and the African butterfly fish (Pantodontidae). This morphologically heterogeneous group also has a long and diverse fossil record, including taxa from all continents and both freshwater and marine deposits. The phylogenetic relationships among most extant osteoglossomorph families are widely agreed upon. However, there is still much to discover about the systematic biology of these fishes, particularly with regard to the phylogenetic affinities of several fossil taxa, within Mormyridae, and the position of Pantodon. In this paper we review the state of knowledge for osteoglossomorph fishes. We first provide an overview of the diversity of Osteoglossomorpha, and then discuss studies of the phylogeny of Osteoglossomorpha from both morphological and molecular perspectives, as well as biogeographic analyses of the group. Finally, we offer our perspectives on future needs for research on the systematic biology of Osteoglossomorpha. Keywords: Biogeography, Osteoglossidae, Paleontology, Phylogeny, Taxonomy. Os peixes da Superordem Osteoglossomorpha têm sido foco de inúmeros estudos sobre a morfologia, sistemática e evo- lução, particularmente devido à sua posição basal dentre os peixes teleósteos.
    [Show full text]
  • The Origin and Biogeographic Diversification of Fishes in the Family Poeciliidae
    RESEARCH ARTICLE The origin and biogeographic diversification of fishes in the family Poeciliidae David N. Reznick1*, Andrew I. Furness2, Robert W. Meredith3, Mark S. Springer1 1 Department of Biology, University of California Riverside, Riverside, California, United States of America, 2 Department of Ecology and Evolutionary Biology, University of California Irvine, Irvine, California, United States of America, 3 Department of Biology and Molecular Biology, Montclair State University, Montclair, New Jersey, United States of America * [email protected] a1111111111 a1111111111 a1111111111 Abstract a1111111111 a1111111111 The fish subfamily Poeciliinae (sensu Parenti, 1981) is widely distributed across the West- ern Hemisphere and a dominant component of the fish communities of Central America. Poeciliids have figured prominently in previous studies on the roles of dispersal and vicari- ance in shaping current geographic distributions. Most recently, Hrbek et al. combined a OPEN ACCESS DNA-based phylogeny of the family with geological models to provide a biogeographic per- spective that emphasized the role of both vicariance and dispersal. Here we expand on that Citation: Reznick DN, Furness AI, Meredith RW, Springer MS (2017) The origin and biogeographic effort with a database enlarged in the quantity of sequence represented per species, in the diversification of fishes in the family Poeciliidae. number of species included, and in an enlarged and more balanced representation of the PLoS ONE 12(3): e0172546. doi:10.1371/journal. order Cyprinodontiformes. We combine a robust timetree based upon multiple fossil calibra- pone.0172546 tions with enhanced biogeographic analyses that include ancestral area reconstructions to Editor: Axel Meyer, University of Konstanz, provide a detailed biogeographic history of this clade.
    [Show full text]
  • Tayside, Central and Fife Tayside, Central and Fife
    Detail of the Lower Devonian jawless, armoured fish Cephalaspis from Balruddery Den. © Perth Museum & Art Gallery, Perth & Kinross Council Review of Fossil Collections in Scotland Tayside, Central and Fife Tayside, Central and Fife Stirling Smith Art Gallery and Museum Perth Museum and Art Gallery (Culture Perth and Kinross) The McManus: Dundee’s Art Gallery and Museum (Leisure and Culture Dundee) Broughty Castle (Leisure and Culture Dundee) D’Arcy Thompson Zoology Museum and University Herbarium (University of Dundee Museum Collections) Montrose Museum (Angus Alive) Museums of the University of St Andrews Fife Collections Centre (Fife Cultural Trust) St Andrews Museum (Fife Cultural Trust) Kirkcaldy Galleries (Fife Cultural Trust) Falkirk Collections Centre (Falkirk Community Trust) 1 Stirling Smith Art Gallery and Museum Collection type: Independent Accreditation: 2016 Dumbarton Road, Stirling, FK8 2KR Contact: [email protected] Location of collections The Smith Art Gallery and Museum, formerly known as the Smith Institute, was established at the bequest of artist Thomas Stuart Smith (1815-1869) on land supplied by the Burgh of Stirling. The Institute opened in 1874. Fossils are housed onsite in one of several storerooms. Size of collections 700 fossils. Onsite records The CMS has recently been updated to Adlib (Axiel Collection); all fossils have a basic entry with additional details on MDA cards. Collection highlights 1. Fossils linked to Robert Kidston (1852-1924). 2. Silurian graptolite fossils linked to Professor Henry Alleyne Nicholson (1844-1899). 3. Dura Den fossils linked to Reverend John Anderson (1796-1864). Published information Traquair, R.H. (1900). XXXII.—Report on Fossil Fishes collected by the Geological Survey of Scotland in the Silurian Rocks of the South of Scotland.
    [Show full text]
  • The Lost World of Fossil Lake
    Snapshots from Deep Time THE LOST WORLD of FOSSIL LAKE lance grande With photography by Lance Grande and John Weinstein The University of Chicago Press | Chicago and London Ray-Finned Fishes ( Superclass Actinopterygii) The vast majority of fossils that have been mined from the FBM over the last century and a half have been fossil ray-finned fishes, or actinopterygians. Literally millions of complete fossil ray-finned fish skeletons have been excavated from the FBM, the majority of which have been recovered in the last 30 years because of a post- 1970s boom in the number of commercial fossil operations. Almost all vertebrate fossils in the FBM are actinopterygian fishes, with perhaps 1 out of 2,500 being a stingray and 1 out of every 5,000 to 10,000 being a tetrapod. Some actinopterygian groups are still poorly understood be- cause of their great diversity. One such group is the spiny-rayed suborder Percoidei with over 3,200 living species (including perch, bass, sunfishes, and thousands of other species with pointed spines in their fins). Until the living percoid species are better known, ac- curate classification of the FBM percoids (†Mioplosus, †Priscacara, †Hypsiprisca, and undescribed percoid genera) will be unsatisfac- tory. 107 Length measurements given here for actinopterygians were made from the tip of the snout to the very end of the tail fin (= total length). The FBM actinop- terygian fishes presented below are as follows: Paddlefishes (Order Acipenseriformes, Family Polyodontidae) Paddlefishes are relatively rare in the FBM, represented by the species †Cros- sopholis magnicaudatus (fig. 48). †Crossopholis has a very long snout region, or “paddle.” Living paddlefishes are sometimes called “spoonbills,” “spoonies,” or even “spoonbill catfish.” The last of those common names is misleading because paddlefishes are not closely related to catfishes and are instead close relatives of sturgeons.
    [Show full text]
  • Teleostei, Osteoglossiformes) in the Continental Lower Cretaceous of the Democratic Republic of Congo (Central Africa
    Geo-Eco-Trop., 2015, 39, 2 : 247-254 On the presence of a second osteoglossid fish (Teleostei, Osteoglossiformes) in the continental Lower Cretaceous of the Democratic Republic of Congo (Central Africa) Sur la présence d’un second poisson ostéoglossidé (Teleostei, Osteoglossiformes) dans le Crétacé inférieur continental de la République Démocratique du Congo (Afrique centrale) Louis TAVERNE 1 Résumé: Un hyomandibulaire de téléostéen découvert dans les couches de la Formation de la Loia (Aptien- Albien continental) à Yakoko, sur la rivière Lomami, Province Centrale, République Démocratique du Congo, est décrit et ses relations phylogénétiques sont discutées. L’os est grand et porte un processus operculaire très allongé. Des comparaisons avec d’autres téléostéens du Crétacé inférieur continental indiquent que cet hyomandibulaire appartient à un ostéoglossidé qui semble proche de Paralycoptera. Mots-clés: Teleostei, Osteoglossidae, hyomandibulaire, Formation de la Loia, Crétacé inférieur continental, Yakoko, République Démocratique du Congo Abstract: A teleost hyomandibula discovered in the deposits of the Loia Formation (continental Aptian- Albian) at Yakoko, on the Lomami River, Central Province, Democratic Republic of Congo, is described and its phylogenetic relationships are discussed. The bone is rather large and bears an extremely long opercular process. Comparisons with other freshwater Early Cretaceous teleosts indicate that this hyomandibula belongs to an osteoglossid fish that seems close to Paralycoptera. Key words: Teleostei, Osteoglossidae, hyomandibula, Loia Formation, continental Early Cretaceous, Yakoko, Democratic Republic of Congo. INTRODUCTION The Loia and the Bokungu Formations are respectively the lower and the upper strata within the continental Early Cretaceous deposits of the Congolese Cuvette and the surrounding zones, in the Democratic Republic of Congo (CAHEN et al., 1959, 1960; CASIER, 1961).
    [Show full text]
  • A Review of the Systematic Biology of Fossil and Living Bony-Tongue Fishes, Osteoglossomorpha (Actinopterygii: Teleostei)" (2018)
    W&M ScholarWorks VIMS Articles Virginia Institute of Marine Science 2018 A review of the systematic biology of fossil and living bony- tongue fishes, Osteoglossomorpha (Actinopterygii: Teleostei) Eric J. Hilton Virginia Institute of Marine Science Sebastien Lavoue Follow this and additional works at: https://scholarworks.wm.edu/vimsarticles Part of the Aquaculture and Fisheries Commons Recommended Citation Hilton, Eric J. and Lavoue, Sebastien, "A review of the systematic biology of fossil and living bony-tongue fishes, Osteoglossomorpha (Actinopterygii: Teleostei)" (2018). VIMS Articles. 1297. https://scholarworks.wm.edu/vimsarticles/1297 This Article is brought to you for free and open access by the Virginia Institute of Marine Science at W&M ScholarWorks. It has been accepted for inclusion in VIMS Articles by an authorized administrator of W&M ScholarWorks. For more information, please contact [email protected]. Neotropical Ichthyology, 16(3): e180031, 2018 Journal homepage: www.scielo.br/ni DOI: 10.1590/1982-0224-20180031 Published online: 11 October 2018 (ISSN 1982-0224) Copyright © 2018 Sociedade Brasileira de Ictiologia Printed: 30 September 2018 (ISSN 1679-6225) Review article A review of the systematic biology of fossil and living bony-tongue fishes, Osteoglossomorpha (Actinopterygii: Teleostei) Eric J. Hilton1 and Sébastien Lavoué2,3 The bony-tongue fishes, Osteoglossomorpha, have been the focus of a great deal of morphological, systematic, and evolutio- nary study, due in part to their basal position among extant teleostean fishes. This group includes the mooneyes (Hiodontidae), knifefishes (Notopteridae), the abu (Gymnarchidae), elephantfishes (Mormyridae), arawanas and pirarucu (Osteoglossidae), and the African butterfly fish (Pantodontidae). This morphologically heterogeneous group also has a long and diverse fossil record, including taxa from all continents and both freshwater and marine deposits.
    [Show full text]
  • Ridewoodichthys, a New Genus for Brychaetus Caheni from the Marine
    BULLETIN DE L’INSTITUT ROYAL DES SCIENCES NATURELLES DE BELGIQUE SCIENCES DE LA TERRE, 79: 147-153, 2009 BULLETIN VAN HET KONINKLIJK BELGISCH INSTITUUT VOOR NATUURWETENSCHAPPEN AARDWETENSCHAPPEN, 79: 147-153, 2009 Ridewoodichthys, a new genus for Brychaetus caheni from the marine Paleocene of Cabinda (Africa): re-description and comments on its relationships within the Osteoglossidae (Teleostei, Osteoglossomorpha) by Louis TAVERNE TAVERNE, L., 2009 – Ridewoodichthys, a new genus for a marine species. Later, fossil osteoglossid fragments Brychaetus caheni from the marine Paleocene of Cabinda regarded as B. muelleri or as B. aff. muelleri were (Africa): re-description and comments on its relationships within mentioned in several marine Paleocene and Lower the Osteoglossidae (Teleostei, Osteoglossomorpha). Bulletin de Eocene formations of Morocco, Niger and U.S.A. l’Institut royal des Sciences naturelles de Belgique, Sciences de la Terre, 79: 147-153, 5 figs, Brussels, October 31, 2009 – ISSN (ARAMBOURG & SIGNEUX, 1952: 243, pl. 37, fig. 43, 0374-6291. 44; CAPPETTA, 1972: 224, pl. 12, fig. 8; EEMSW & HORMAN, 1983: 43-45, fig. 4; CASE, 1994: 144, pl. 2, fig. 392-393). Recently, a Brychaetus sp. has been Abstract signalized in the marine Lower Eocene of Denmark (BONDE, 2008: 290-291, fig. 23, 24). The marine osteoglossid “Brychaetus” caheni from the Lower In the third part of their big monograph on the Paleocene of Cabinda (Africa) is re-studied. It does not belong to fossil fishes from the Lower-Congo and bordering the genus Brychaetus because of differences in teeth and premaxilla shape. It is assigned to the new genus Ridewoodichthys on the basis countries, DARTEVELLE & CASIER (1959: 351-352, pl.
    [Show full text]
  • 1 Evolutionary Time Best Explains the Global Distribution of Living
    Evolutionary time best explains the global distribution of living freshwater fish diversity SUPPLEMENTARY INFORMATION Included in this document: Supplementary text: 1. Extended Methods 2. Extended Results 1: Comparing colonization time estimates between two phylogenies, one with fossil taxa 3. Extended Results 2: Effect of excluding early diverging lineages on diversification rate and colonization time estimates of basins Supplementary tables: 1. Table S1: Constraints on dispersal used in stratified DEC model 2. Table S2: Change in richness, diversification rates, time-for-speciation and surface area with latitude and longitude 3. Table S3: Effect of time-for-speciation and diversification rates on species richness 4. Table S4: Effect of time-for-speciation and diversification rates on species richness while controlling for the species-area scaling 5. Table S5: Relationship between diversification rates and colonization times 6. Table S6: Influence of area on trends in diversification rates and time-for-speciation 7. Table S7: Regions assigned to fossil taxa with references Supplementary figures: 8. Figure S1: The relationship between basin surface area and richness 9. Figure S2: Method to illustrate complex colonization-richness temporal dynamics 10. Figure S3: Comparing colonization time estimates between alternative phylogenies References Included in FigShare repository (doi: 10.6084/m9.figshare.8251394): 1. Table A1: Presence Absence Matrix (PAM) summarizing the distribution of 14,947 species across 3,119 basins 2. Table A2: Basin-specific mean rates of diversification based on BAMM and DR 3. Table A3: Species-specific mean colonization times derived from ancestral area reconstruction analyses. 4. Table A4: Basin-specific mean and median colonization times 5.
    [Show full text]