DOCSLIB.ORG

Jahns 1954P59.Pdf

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

OLOGY [Bull. 170 1can 7. MARINE-NONMARINE RELATIONSHIPS IN THE CENOZOIC SECTION OF CALIFORNIA* .c, Childs, 1921, op. cit. BY J. WYATT DURHAM,t RICHARD H . JAHNS, t ltz, J. R., 1037, A late Cenozoic vertebrate fauna from the Coso Mountains, AND DONALD E . SAVAGE§ yo County, California : Carnegie Inst. Washington Pub. No. 487, pp. 75-109. INTRODUCTION Latest Highly fossiliferous marine sediments of Cenozoic age are widely 1gtonian 111•', 1' k, Childs, 1921, op. cit. distributed in the coastal parts of central and southern California, C'_q·,~/, FR E </;,:'!lo as well as in the Sacramento-San Joaquin Valley region farther in­ · ~ cholabrean 0-?~ 1ey, R. ,V., and Mason, H . L., 1933, A Pleistocene flora from the asphalt land. Even more widespread are nonmarine, chiefly terrestrial, ) •'8 1'/ ' posits at Carpinteria, California: Carnegie Inst. 'Vnshington Pub. No. 415, sequences of Cenozoic strata, many of which contain vertebrate .\)~ I N Y 0 . 4u-79. faunas characterized by a dominance of mammalian forms. These <I '""'...', k, Chester, 1953, Rancho La Bren: Los Angeles County l\Iuseum, Science strata are most abundant in the Mojave Desert region and in the r., no. 5, Paleontology no. 9, 5th ed., pp. 1-81. interior parts of areas that lie nearer the coast. Marine and nonmarine strata are in juxtaposition or interfinger with one another at many places, especially in the southern Coast S A N Ranges and the San Joaquin basin to the east, in the Transverse 8ERNAROINO Ranges and adjacent basins, and in several parts of the Peninsular K E R N Range region and the Coachella-Imperial Valley to the east. These ,/.---;;. occurrences of closely related marine and nonmarine deposits permit critical comparisons between the Pacific Coast mammalian ( ter­ ' restrial) and invertebrate (marine) chronologies, and it is with these comparisons-examined in the light of known stratigraphic relations-that this paper is primarily concerned. Ventura ( ,- The writers have drawn freely upon the published record for geologic and paleontologic data. In addition, Durham has reviewed LOCAL I T I ES I . M1n1on Son 0 1eQo 2. Son Pedro area many of the invertebrate faunas and has checked the field relations 3. Puente Hill s of marine strata in parts of the Ventura and Soledad basins, the 4. Ventura area 5 Los Posas Hills Tejon Hills, and the Cammatta Ranch ; Jahns has studied new verte­ 6 North side of Simi Volley 1 .' South Mountain 0 brate material from the Soledad basin and has mapped this area and 8. Soledad Mountain C' ~ 9, Sespe Creek ~,,,. ·7 critical areas. in the vicinity of San Diego, in the Ventura basin, 10 Quatal and Apache Canyons 11 Tecuya Creek 12. Te1on Hiiis and in the Caliente Range ; and Savage has made a detailed ap­ 13. Caliente Ronoe 14. Crocker Sprinos ,.. praisal of the vertebrate assemblages, and has mapped critical areas 15. Cammotto Ranch (Commat11) 16. Ketflemon Hiiis 11eo in the Tejon Hills. The areas and loc-alities that have been most care­ 17. South Coolln9a district 18, North Coahn9a district l fully scrutinized are shown in figure 1. 0 20 40 60 • • •.--l...--J The manuscript was reviewed in detail by G. Edward Lewis of SCALE IN MILES r 1110 the U. S. Geological Survey, who made numerous comments and suggestions that resulted in considerable improvement. It should FIGURE 1. Index map of a part of southern California, showing locations of marine-nonmarine tie-im; discussed in the text. be noted that his views are not wholly compatible with sqme of those expressed in this paper, and that his critical appraisal thus was particularly helpful. •A contribution from the Museum of Paleontology of the University of California, Berkeley ; Contribution No. 664, Division of the Geological Sciences, California Institute of Technology. t Professor of Paleontology, University of California, Berkeley. t Professor of Geology, California Institute of Technology, Pasadena. § Assistant Professor of Paleontology, University of California, Berkeley. ( 59) 60 HISTORICAL GEOLOGY [Bull. 170 Chapt. III] CENOZOIC MARINE-NONMARINE RI .c .c i 8_ Pacific Coast i 8. Pacific Coast S D . .2 u o u an 1ego Los Angeles ~ g microfounal ~ g meoafounol j Ventura County San Luis Obispo West side of Kern County County ~~ stage 8~ "staoe County County San Joaquin Valley ~ ~ 6t- I.LI Upper ,_6 LLI "Upp er • ' . ",. Posandl o1 4Vemar• d• n:•e~) X1 ~~ Hollian 1-- ~~ ~x x 1 SAN PEDRO ct. u Lower ~o "Lower• PLE ISTOC ENE un I Xi AREA Wheelerion --- LLI Son Joaquin PLI OCE NE LA~ , r~~AS PL;~~~~~~ ~E _______ ~ Venturion ~ Etcheooin VENTURA ~ g AREA 3 Repettian · ~ Jocolitos ~ Jocolitos 0.. I PLIO~N~ fm lmorine) / J MIOCENE -- Chcnoc Im ~ x Sonia I X t--_J Neroly C0$1!l ., ~~;~~,~- .. ~ I/ Fta x\ Morqorilo SOUTH l"Modek tmoru1e1 ~";,:-"'I.no,... -<;; ,,; Delmont ion i---- fm. lmorinel COALING, Puen te 11 Im Post~~ - ~""'' ~ Temblor D ----' OISTRICl Cierbo Im (mon111 11 lmor1ne) CROCKER Moocopo m:~I;: -s I ~1 SPRINGS J-....--. Moocopo Mohnion --- LtJz ~ T shale Ix • shale IX I emblor· (mo 1nly lmorinel ------i ___ LLI Monterey monnel 'I ~ 11-_L_u_is_ia_n_---t g Temblor beds (monne PUENTE HILLS TE JON CAM MATTA ~ Relizian / ~ Vaqueros ~queros Vaqueros HILLS RANCH Im (CO MM AT Tl) tmor1nel i I Vaqueros :-- ~' -~: lm.lmodnel ~, ~l: I L___ 11 OUATAL ANO APACHE Soucesion I / t-- Blakeley M 10CEN E. l I _ _ espe CANYONS , OLIGOCENE XI Im (UPPER MIOCENE CUYAMA OLIGOCENE ~ I ~ DRAINAGE) \ / ~ t-----4 s.... ~ 1 \ Zemorrion o '"'· SOUTH gUJ ~ Lincoln MOUNTAI N Sespe -z ~ Im. 6 ~ Refu9ion ° Sue>• x ....... _ OLIGOCENE hn. X - ~~ EOCENE -- XI OLJ§.Qgfil Keasey ------------ EOCENE I ? ? I xi h?---l xl Coldwoler sandstone Tejon ~ ~ SES PE ~ ~ Llojo1fm I O?? CREEK u.i H---1 w "Transition and 1oun9er c · -:...._·~ g g Eoctn• bed1 Llojos EX PLANA T ION W w . MISSION (morine) m. (morine) Oomengine SAN DIEGO -- Section oroken within o for motion -1 Pos1i. ons ot 1euestriot verlebfoles w1th1n sechon LAS POSAS NORTH SI OE HILLS SIMI VALLEY ~ ~ General pos111on of ve rretirore ossembloqe m lerms 1...,--- of the vertebrate chrono109y shown of r19hl on lhe chart Cop a~ I .;.-- Unconformity w1thm section Formolion boundary w1th1n section EOCENE r --- PAi£OCEN£ --- unconformity represenhrMJ mo1or time ntervol I ~ Meoonos Formation boundary w1thm section, opproxrmately I --- IOCoted . B --- Section broken al formo11on boundary ~---- Ver11col pos 111ons ol formot1ons 1n section ore shown gn ---1 1n lerms ol mverlebrote megolouool sequence ~ ~ Formo11ons ore nonmorme unless otherwise designated ':. ~ I Martinez . vertical spocmg of Terl1ory chronolo91c units s based on es11mo1ed durohons 1n years The Pleistocene epoch 1s orb1trorily expanded FIGURE 2. Summary of Cenozoic marine-nonmarine relationships in California, showing ,·urious correhttions of microfuunal, megufoull lid IPrrestrinl \'ertehrate occurrences with the }Juropean reference section. Based ii 1 :::ltirton ( llKil), 1her8 noted in tPxt. OLOGY [Bull. 170 Chapt. III] CENOZOIC MARINE- NONMARINE RELATIONSHIPS-DURHAM, JAHNS, AND SAVAGE 61 North u "0" European Los Angeles West side of Son Francisco Amedcon Ventura County r Son Luis Obispo I provincia l ~~ reference Kern County o; c County ages section County Son Joaquin Valley Boy area ~~ (terrestrial oo; (stages) vertebrates) ~ Po1osverd 1 s~ X1 i-- 6 sond 1morin1) Ro ncholobrean .... .,, SAN PEDRO <llZ Llmllli!!!.L...~ xi? xi" ' AREA w"' I Xi lrvingtonion _,o Sicilian LAS POSAS - · PLEl~OC".!E;.!N;!-E!;_ _______________________ 0.. HILLS ~LIOCE N E Colobrion Bl oncon VEN TU RA Elchec;ioin I Astion AREA Im. tma';"I JX ,..----­ ,:N~n~;;;ri~; I ""z Ploisoncion ~ Joco litos I I JocolitoS' x vo ll"'""ey Im . x, f.rn lma ri no el X "" ,_ beds X• (marine} Hemphillion r---..?-... ? /" - I ~ Pont ion Santo Sonia Ix Sonia Coste,, ~ 1 SOUTH Margarito Neroly x \ w Mor9or110 Margarito l"Mode 1c 1morine} -2! ~ fm . lmorinel COALINGA Post- - ,,.~· I tm _____J ~~~'!!! Im. Temblor DISTRICT (m~7.-ne) \I ~ lmonnt . I Clorendonion Sormotion marine CROCKER MT. DIABLO Maricopa beds ~ I I :; I ~1 SPRINGS AREA a.. shale ~ IX -..cJ, "'c~E"N t...+--- -- {mo inly ( marine) non-marine 819 Blue Tortonion mtmber Borstovion marine) 'I Mini I PUENTE ~ I Conyc:. ~ xi Helvetian ~ HILLS Im TE JON CAM MATTA tmon r\9} ""z Vaqueros Vaqueros RANCH Vaqueros HILLS Heminofordion I ~ fm {marine) Im . (C OMMATT I) NORTH 0 Burdioolion lmonne) COALINGA 1--,,---- :i; ~ DISTRICT 1~-/'-~1 QUATAL I AND APACHE Ari koreeon I I Aquitonion I I CANYONS :1 _r1:1_ (UPPER - MIOCENE xi - Im v CUYAMA ---- - OLIGOCENE -- ORAi NAGE) Wh i tneyon Chottion Sespe ~ ""z fm SOUTH Orellon 1 ""0 Rupelion MOUNTAIN Sespe 0 Im. "':::; Sespe x ,o fm. Chodronion Tonorion OL IGOCENE ~I EOCENE - ~o -J XI Ouchesneon Ludion Cold waler --- ~ xi sandstone Uinton eartoni on ~ ~ ~ SES PE L lojos fm CREEK I ond younger EXPLANATION Auversion Eocene beds l.. IOJOS ""z Bridoerion {mari ne) tm (mari ne) I ""0 Section broken w1th1 n o formo l ion 0 ~ Lutetian x --~ Pos11tons of terrestrial ver1ebrotes wifh1n section "" NORTH SIDE LAS POSAS X Generol pos11ton of vertebrate assemblage 1n terms HILLS SIMI VALLEY 1---- of the vertebrole chronolooy shown at right on the chart I Cuision .;;....-- Unconformity within section Wosotchion ;, - -- Formolion boundary w1lh1n secl1on Ypresion OCENE [;3 {Spornocion) ~LEOCEN £ --- Un conformity represenl1ng mo1or lime mlervol --~---~p-;=~~~g~~~~E~~----------t--- - Clarkforkian II___ Formallon boundary within :section, approximately ~ --- ·i located - Thonetion L._ - --- Secl1on broken 01 formotton boundary Tiffan i on Vert1co t pos itions of formations tn secllon ore shawi'I z 1n terms of invertebrate megataunal sequence "" Torrejonion I ~ Formollons ore nonmanne unless otherwise designated 0 ~ Vert ica l spacing of Tertiary chronolog1c units •S based on Drogonion I ""~ esh moted durations in years The Pl eis tocene epoch is Monti on orb1trorily expanded_ Puercon foe relationships in California, showing variom; correlatiom; of microfuunal, megafllullfud tnrt>strial ,·ertehrutt> occurrences with the }Juropean reference section.
Recommended publications
  • Carnivora from the Late Miocene Love Bone Bed of Florida

    Carnivora from the Late Miocene Love Bone Bed of Florida

    Bull. Fla. Mus. Nat. Hist. (2005) 45(4): 413-434 413 CARNIVORA FROM THE LATE MIOCENE LOVE BONE BED OF FLORIDA Jon A. Baskin1 Eleven genera and twelve species of Carnivora are known from the late Miocene Love Bone Bed Local Fauna, Alachua County, Florida. Taxa from there described in detail for the first time include the canid cf. Urocyon sp., the hemicyonine ursid cf. Plithocyon sp., and the mustelids Leptarctus webbi n. sp., Hoplictis sp., and ?Sthenictis near ?S. lacota. Postcrania of the nimravid Barbourofelis indicate that it had a subdigitigrade posture and most likely stalked and ambushed its prey in dense cover. The postcranial morphology of Nimravides (Felidae) is most similar to the jaguar, Panthera onca. The carnivorans strongly support a latest Clarendonian age assignment for the Love Bone Bed. Although the Love Bone Bed local fauna does show some evidence of endemism at the species level, it demonstrates that by the late Clarendonian, Florida had become part of the Clarendonian chronofauna of the midcontinent, in contrast to the higher endemism present in the early Miocene and in the later Miocene and Pliocene of Florida. Key Words: Carnivora; Miocene; Clarendonian; Florida; Love Bone Bed; Leptarctus webbi n. sp. INTRODUCTION can Museum of Natural History, New York; F:AM, Frick The Love Bone Bed Local Fauna, Alachua County, fossil mammal collection, part of the AMNH; UF, Florida Florida, has produced the largest and most diverse late Museum of Natural History, University of Florida. Miocene vertebrate fauna known from eastern North All measurements are in millimeters. The follow- America, including 43 species of mammals (Webb et al.
  • Pamphlet to Accompany Geologic Map of the Apache Canyon 7.5

    Pamphlet to Accompany Geologic Map of the Apache Canyon 7.5

    GEOLOGIC MAP AND DIGITAL DATABASE OF THE APACHE CANYON 7.5’ QUADRANGLE, VENTURA AND KERN COUNTIES, CALIFORNIA By Paul Stone1 Digital preparation by P.M. Cossette2 Pamphlet to accompany: Open-File Report 00-359 Version 1.0 2000 This report is preliminary and has not been reviewed for conformity with U. S. Geological Survey editorial standards. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U. S. Government. This database, identified as "Geologic map and digital database of the Apache Canyon 7.5’ quadrangle, Ventura and Kern Counties, California," has been approved for release and publication by the Director of the USGS. Although this database has been reviewed and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. This database is released on condition that neither the USGS nor the U. S. Government may be held liable for any damages resulting from its use. U.S. Geological Survey 1 345 Middlefield Road, Menlo Park, CA 94025 2 West 904 Riverside Avenue, Spokane, WA 99201 1 CONTENTS Geologic Explanation............................................................................................................. 3 Introduction................................................................................................................................. 3 Stratigraphy................................................................................................................................ 4 Structure ....................................................................................................................................
  • Oreodonts of the Tick Canyon Formation , Southern California

    Oreodonts of the Tick Canyon Formation , Southern California

    PALE0B10s Contributions from the University of California Museum of Paleontology, Berkeley No. I June 15, 1967 OREODONTS OF THE TICK CANYON FORMATION , SOUTHERN CALIFORNIA by David P. Whistler OREODONTS OF THE TICK CANYON FORMATION, SOUTHERN CALIFORNIA BY DAVID P. WHISTLER In 1940, Richard H. Jahns reviewed the stratigraphy of the nonmarine Mint Canyon Formation in the eastern part of the Ventura Basin and separated from it a new formation and fauna. Previous to this work, a controversy existed as to the age of the Mint Canyon Formation, for it contained vertebrates considered indicative of both the Miocene and Pliocene (Kew, 1924, Maxson, 1930, and Stirton, 1933). As a partial solut,ion to this controversy, Jahns demonstrated the presence of an erosional unconformity low in the nonmarine sequence which indicated a shift in source area. He redefined the beds below the unconformity as the Tick Canyon Formation (Jahns, 1940, pp. 163-66). Additional fossils discovered in the Tick Canyon Formation since Maxson's work, and certain of the forms described by Maxson, comprise the Tick Canyon fauna. Only two specimens described by Maxson are from the Tick Canyon Formation, UCMP 30046, the type of Miolabis californicus and UCMP 23852, a dentary fragment of a Parahippus. Neither of these permitted a definitive age determination. The additional fauna described by Jahns indicates an Arikareean mammalian age (early Miocene), and there is a noteworthy temporal hiatus between the Tick Canyon fauna and the over­ lying Mint Canyon fauna. In addition, faunas comprising three mammalian ages, late Barstovian, and earlier and late Clarendonian, are now recognized from the Mint Canyon Formation, but this is not the principal concern of this paper.
  • Download Full Article in PDF Format

    Download Full Article in PDF Format

    A new marine vertebrate assemblage from the Late Neogene Purisima Formation in Central California, part II: Pinnipeds and Cetaceans Robert W. BOESSENECKER Department of Geology, University of Otago, 360 Leith Walk, P.O. Box 56, Dunedin, 9054 (New Zealand) and Department of Earth Sciences, Montana State University 200 Traphagen Hall, Bozeman, MT, 59715 (USA) and University of California Museum of Paleontology 1101 Valley Life Sciences Building, Berkeley, CA, 94720 (USA) [email protected] Boessenecker R. W. 2013. — A new marine vertebrate assemblage from the Late Neogene Purisima Formation in Central California, part II: Pinnipeds and Cetaceans. Geodiversitas 35 (4): 815-940. http://dx.doi.org/g2013n4a5 ABSTRACT e newly discovered Upper Miocene to Upper Pliocene San Gregorio assem- blage of the Purisima Formation in Central California has yielded a diverse collection of 34 marine vertebrate taxa, including eight sharks, two bony fish, three marine birds (described in a previous study), and 21 marine mammals. Pinnipeds include the walrus Dusignathus sp., cf. D. seftoni, the fur seal Cal- lorhinus sp., cf. C. gilmorei, and indeterminate otariid bones. Baleen whales include dwarf mysticetes (Herpetocetus bramblei Whitmore & Barnes, 2008, Herpetocetus sp.), two right whales (cf. Eubalaena sp. 1, cf. Eubalaena sp. 2), at least three balaenopterids (“Balaenoptera” cortesi “var.” portisi Sacco, 1890, cf. Balaenoptera, Balaenopteridae gen. et sp. indet.) and a new species of rorqual (Balaenoptera bertae n. sp.) that exhibits a number of derived features that place it within the genus Balaenoptera. is new species of Balaenoptera is relatively small (estimated 61 cm bizygomatic width) and exhibits a comparatively nar- row vertex, an obliquely (but precipitously) sloping frontal adjacent to vertex, anteriorly directed and short zygomatic processes, and squamosal creases.
  • Reef-Coral Fauna of Carrizo Creek, Imperial County, California, and Its Significance

    Reef-Coral Fauna of Carrizo Creek, Imperial County, California, and Its Significance

    THE REEF-CORAL FAUNA OF CARRIZO CREEK, IMPERIAL COUNTY, CALIFORNIA, AND ITS SIGNIFICANCE . .By THOMAS WAYLAND VAUGHAN . INTRODUCTION. occur has been determined by Drs . Arnold and Dall to be lower Miocene . The following conclusions seem warranted : Knowledge of the existence of the unusually (1) There was water connection between the Atlantic and interesting coral fauna here discussed dates Pacific across Central America not much previous to the from the exploration of Coyote Mountain (also upper Oligocene or lower Miocene-that is, during the known as Carrizo Mountain) by H . W. Fair- upper Eocene or lower Oligocene . This conclusion is the same as that reached by Messrs. Hill and Dall, theirs, how- banks in the early nineties.' Dr. Fairbanks ever, being based upon a study of the fossil mollusks . (2) sent the specimens of corals he collected to During lower Miocene time the West Indian type of coral Prof. John C. Merriam, at the University of fauna extended westward into the Pacific, and it was sub- California, who in turn sent them to me . sequent to that time that the Pacific and Atlantic faunas There were in the collection representatives of have become so markedly differentiated . two species and one variety, which I described As it will be made evident on subsequent under the names Favia merriami, 2 Stephano- pages that this fauna is much younger than ctenia fairbanksi,3 and Stephanoccenia fair- lower Miocene, the inference as to the date of banksi var. columnaris .4 As the geologic hori- the interoceanic connection given in the fore- zon was not even approximately known at that going quotation must be modified .
  • Mammalia, Carnivora) from the Blancan of Florida

    Mammalia, Carnivora) from the Blancan of Florida

    THREE NEW PROCYONIDS (MAMMALIA, CARNIVORA) FROM THE BLANCAN OF FLORIDA Laura G. Emmert1,2 and Rachel A. Short1,3 ABSTRACT Fossils of the mammalian family Procyonidae are relatively abundant at many fossil localities in Florida. Analysis of specimens from 16 late Blancan localities from peninsular Florida demonstrate the presence of two species of Procyon and one species of Nasua. Procyon gipsoni sp. nov. is slightly larger than extant Procyon lotor and is distinguished by five dental characters including a lack of a crista between the para- cone and hypocone on the P4, absence of a basin at the lingual intersection of the hypocone and protocone on the P4, and a reduced metaconule on the M1. Procyon megalokolos sp. nov. is significantly larger than extant P. lotor and is characterized primarily by morphology of the postcrania, such as an expanded and posteriorly rotated humeral medial epicondyle, more prominent tibial tuberosity, and more pronounced radioulnar notch. Other than larger size, the dentition of P. megalokolos falls within the range of variation observed in extant P. lotor, suggesting that it may be an early member of the P. lotor lineage. Nasua mast- odonta sp. nov. has a unique accessory cusp on the m1 as well as multiple morphological differences in the dentition and postcrania, such as close appression of the trigonid of the m1 and a less expanded medial epicondyle of the humerus. We also synonymize Procyon rexroadensis, formerly the only known Blancan Procyon species in North America, with P. lotor due to a lack of distinct dental morphological features observed in specimens from its type locality in Kansas.
  • The Great American Biotic Interchange: Patterns and Processes Author(S): S

    The Great American Biotic Interchange: Patterns and Processes Author(S): S

    The Great American Biotic Interchange: Patterns and Processes Author(s): S. David Webb Source: Annals of the Missouri Botanical Garden, Vol. 93, No. 2 (Aug., 2006), pp. 245-257 Published by: Missouri Botanical Garden Press Stable URL: http://www.jstor.org/stable/40035724 . Accessed: 08/04/2014 23:14 Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at . http://www.jstor.org/page/info/about/policies/terms.jsp . JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact [email protected]. Missouri Botanical Garden Press is collaborating with JSTOR to digitize, preserve and extend access to Annals of the Missouri Botanical Garden. http://www.jstor.org This content downloaded from 137.111.226.20 on Tue, 8 Apr 2014 23:14:05 PM All use subject to JSTOR Terms and Conditions THE GREAT AMERICAN BIOTIC S. David Webb2 INTERCHANGE: PATTERNS AND PROCESSES1 Abstract Whenthe Panamanianland bridgewas emplacedabout 2.7 Ma, it triggeredthe GreatAmerican Biotic Interchange(GABI), a major mingling of land mammal faunas between North and South America. Four families of northern immigrants (Procyonidae,Felidae, Tayassuidae,and Camelidae)diversified at moderaterates, while four others, Canidae, Mustelidae, Cervidae, and especially Muridae, evolved explosively. As a consequence, half of living South American genera are descendantsof northernimmigrants. The other major consequence of the interchangewas the conquest of tropical North Americaby immigrantsfrom Amazonia, an episode that justifies the term NeotropicalRealm.
  • Santa Monica Mountains National Recreation Area Geologic

    Santa Monica Mountains National Recreation Area Geologic

    National Park Service Geologic Map of Santa Monica Mountains National Recreation Area U.S. Department of the Interior California Geologic Resources Inventory Natural Resource Stewardship and Science This map displays geologic map data compiled by the National Park Service Geologic Resources Inventory. Full Extent of GRI GIS Data It is not a substitute for site-specific investigations. Tss C O N E J O V A L L E Y Source Maps Poster Layout CALIFORNIA34 Tsi Tlv Blvd Canyon Topanga S A N F E R N A N D O Campbell, R.H., C.J. Wills, P.J. Irvine, and B.J Swanson (digital preparation by Chase Winters and Georgia Hybels C.I. Gutierrez and M.D. O'Neal). 2014. Preliminary geologic map of the (Colorado State University) V A L L E Y Kc Los Angeles 30' x 60' quadrangle, California (scale 1:100,000). Version 2.0. Poster Date California Geological Survey and the US Geological Survey. September 2016 National Park 23 Service Headquarters Tan, S.S., K.B. Clahan, C.S. Hitchcock, C.I. Gutierrez, and M.T. Mascorro. 2004. GRI Data Date Geologic map of the Camarillo 7.5-minute quadrangle, Ventura County, August 2016 California (scale 1:24,000). Version 1.0. Preliminary geologic maps. California O X N A R D Geological Survey. 101 P L A I N Wills, C.J., R.H. Campbell, and P.J. Irvine. 2012. Geologic map database of the Santa Monica Mountains region, Los Angeles and Ventura Counties, PACIFIC Tm California (scale 1:24,000). Unpublished. California Geological Survey.
  • Mammalia, Felidae, Canidae, and Mustelidae) from the Earliest Hemphillian Screw Bean Local Fauna, Big Bend National Park, Brewster County, Texas

    Mammalia, Felidae, Canidae, and Mustelidae) from the Earliest Hemphillian Screw Bean Local Fauna, Big Bend National Park, Brewster County, Texas

    Chapter 9 Carnivora (Mammalia, Felidae, Canidae, and Mustelidae) From the Earliest Hemphillian Screw Bean Local Fauna, Big Bend National Park, Brewster County, Texas MARGARET SKEELS STEVENS1 AND JAMES BOWIE STEVENS2 ABSTRACT The Screw Bean Local Fauna is the earliest Hemphillian fauna of the southwestern United States. The fossil remains occur in all parts of the informal Banta Shut-in formation, nowhere very fossiliferous. The formation is informally subdivided on the basis of stepwise ®ning and slowing deposition into Lower (least fossiliferous), Middle, and Red clay members, succeeded by the valley-®lling, Bench member (most fossiliferous). Identi®ed Carnivora include: cf. Pseudaelurus sp. and cf. Nimravides catocopis, medium and large extinct cats; Epicyon haydeni, large borophagine dog; Vulpes sp., small fox; cf. Eucyon sp., extinct primitive canine; Buisnictis chisoensis, n. sp., extinct skunk; and Martes sp., marten. B. chisoensis may be allied with Spilogale on the basis of mastoid specialization. Some of the Screw Bean taxa are late survivors of the Clarendonian Chronofauna, which extended through most or all of the early Hemphillian. The early early Hemphillian, late Miocene age attributed to the fauna is based on the Screw Bean assemblage postdating or- eodont and predating North American edentate occurrences, on lack of de®ning Hemphillian taxa, and on stage of evolution. INTRODUCTION southwestern North America, and ®ll a pa- leobiogeographic gap. In Trans-Pecos Texas NAMING AND IMPORTANCE OF THE SCREW and adjacent Chihuahua and Coahuila, Mex- BEAN LOCAL FAUNA: The name ``Screw Bean ico, they provide an age determination for Local Fauna,'' Banta Shut-in formation, postvolcanic (,18±20 Ma; Henry et al., Trans-Pecos Texas (®g.
  • Barren Ridge FEIS-Volume IV Paleo Tech Rpt Final March

    Barren Ridge FEIS-Volume IV Paleo Tech Rpt Final March

    March 2011 BARREN RIDGE RENEWABLE TRANSMISSION PROJECT Paleontological Resources Assessment Report PROJECT NUMBER: 115244 PROJECT CONTACT: MIKE STRAND EMAIL: [email protected] PHONE: 714-507-2710 POWER ENGINEERS, INC. PALEONTOLOGICAL RESOURCES ASSESSMENT REPORT Paleontological Resources Assessment Report PREPARED FOR: LOS ANGELES DEPARTMENT OF WATER AND POWER 111 NORTH HOPE STREET LOS ANGELES, CA 90012 PREPARED BY: POWER ENGINEERS, INC. 731 EAST BALL ROAD, SUITE 100 ANAHEIM, CA 92805 DEPARTMENT OF PALEOSERVICES SAN DIEGO NATURAL HISTORY MUSEUM PO BOX 121390 SAN DIEGO, CA 92112 ANA 032-030 (PER-02) LADWP (MARCH 2011) SB 115244 POWER ENGINEERS, INC. PALEONTOLOGICAL RESOURCES ASSESSMENT REPORT TABLE OF CONTENTS 1.0 INTRODUCTION ........................................................................................................................... 1 1.1 STUDY PERSONNEL ....................................................................................................................... 2 1.2 PROJECT DESCRIPTION .................................................................................................................. 2 1.2.1 Construction of New 230 kV Double-Circuit Transmission Line ........................................ 4 1.2.2 Addition of New 230 kV Circuit ......................................................................................... 14 1.2.3 Reconductoring of Existing Transmission Line .................................................................. 14 1.2.4 Construction of New Switching Station .............................................................................
  • Appendices D Through I

    Appendices D Through I

    Appendix D Operation & Maintenance Appendix D. Operation and Maintenance Plan Operation and Maintenance Plan This document presents the operation and maintenance (O&M) plan for Western Area Power Administration’s (Western) Sierra Nevada Region (SNR) transmission line systems. 1.0 Inspection/System Management In compliance with Western’s Reliability Centered Maintenance Program, Western would conduct aerial, ground, and climbing inspections of its existing transmission infrastructure since initial construction. The following paragraphs describe Western’s inspection requirements. Aerial Inspections Aerial inspections would be conducted a minimum of every 6 months by helicopter or small plane over the entire transmission system to check for hazard trees1 or encroaching vegetation, as well as to locate damaged or malfunctioning transmission equipment. Typically, aerial patrols would be flown between 50 and 300 feet above Western’s transmission infrastructure depending on the land use, topography, and infrastructure requirements. In general, the aerial inspections would pass over each segment of the transmission line within a one-minute period. Ground Inspections Annual ground inspections would check access to the towers/poles, tree clearances, fences, gates, locks, and tower hardware, and ensure that each structure would be readily accessible in the event of an emergency. They would allow for the inspection of hardware that would not be possible by air, and identify redundant or overgrown access roads that should be permanently closed and returned to their natural state. Ground inspections would typically be conducted by driving a pickup truck along the ROW and access roads. Detailed ground inspections would be performed on 20 percent of all lines and structures annually, for 100 percent inspection every 5 years.
  • Deep Sea Drilling Project Initial Reports Volume 13

    Deep Sea Drilling Project Initial Reports Volume 13

    M. HAJOS 34.5. THE MEDITERRANEAN DIATOMS Marta Hajos, Hungarian Geological Institute, Budapest, Hungary INTRODUCTION species. The relevant information has been obtained from the references cited at the end of this chapter and from Ten washed samples taken at eight levels from the drill investigations of Hungarian fossiliferous localities. cores of the Mediterranean expedition of the Deep Sea The 175 taxa investigated belong primarily to the phyla Drilling Project were sent for study to the present writer by Chrysophyta and Bacillariophyta, and are accompanied in Paulian Dumitrica of the Geological Institute, Bucharest, subordinate numbers by representatives of Phytolitharia, Rumania. He had found these samples to be the richest Acritarcha, Radiolaria and Porifera. diatom-bearing sediments both in terms of species and The paleoecological assignments shown in Table 1 and individuals. the complete floral spectrum allow three paleo-ecological Two samples from Core 13 of Site 124—Balearic Rise1 divisions, representing three areas of the Mediterranean and were selected near levels of finely laminated dolomitic three different sedimentary facies, to be distinguished. marls with dark green to black interbeds. This dolomitic unit is part of the evaporite series cored in the deep Balearic Division 1 — Siliceous Dolomitic Marls of Site 124 Basin. All six samples from Sites 127 and 128 in the 2 Hellenic Trench of the Ionian Basin are from layers of The sediments of the two samples from Site 124 dark sapropelitic ooze, where the siliceous microfauna is (124-13-2, 89-90 cm and 124-13-2, 127-129 cm) were particularly abundant. The remaining two samples are from apparently deposited under the same ecological conditions.