Caribbean Geology: an Introduction ©1994 the Authors U.W.I
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Intrusive and Depositional Constraints on the Cretaceous Tectonic History of the Southern Blue Mountains, Eastern Oregon
THEMED ISSUE: EarthScope IDOR project (Deformation and Magmatic Modification of a Steep Continental Margin, Western Idaho–Eastern Oregon) Intrusive and depositional constraints on the Cretaceous tectonic history of the southern Blue Mountains, eastern Oregon R.M. Gaschnig1,*, A.S. Macho2,*, A. Fayon3, M. Schmitz4, B.D. Ware4,*, J.D. Vervoort5, P. Kelso6, T.A. LaMaskin7, M.J. Kahn2, and B. Tikoff2 1SCHOOL OF EARTH AND ATMOSPHERIC SCIENCES, GEORGIA INSTITUTE OF TECHNOLOGY, 311 FERST DRIVE, ATLANTA, GEORGIA 30332, USA 2DEPARTMENT OF GEOSCIENCE, UNIVERSITY OF WISCONSIN-MADISON, 1215 W DAYTON STREET, MADISON, WISCONSIN 53706, USA 3DEPARTMENT OF EARTH SCIENCES, UNIVERSITY OF MINNESOTA TWIN CITIES, 310 PILLSBURY DRIVE SE, MINNEAPOLIS, MINNESOTA 55455, USA 4DEPARTMENT OF GEOSCIENCES, BOISE STATE UNIVERSITY, 1910 UNIVERSITY DRIVE, BOISE, IDAHO 83725, USA 5SCHOOL OF THE ENVIRONMENT, WASHINGTON STATE UNIVERSITY, PO BOX 64281, PULLMAN, WASHINGTON 99164, USA 6DEPARTMENT OF GEOLOGY AND PHYSICS, LAKE SUPERIOR STATE UNIVERSITY, CRAWFORD HALL OF SCIENCE, SAULT STE. MARIE, MICHIGAN 49783, USA 7DEPARTMENT OF GEOGRAPHY AND GEOLOGY, UNIVERSITY OF NORTH CAROLINA, DELOACH HALL, 601 SOUTH COLLEGE ROAD, WILMINGTON, NORTH CAROLINA 28403, USA ABSTRACT We present an integrated study of the postcollisional (post–Late Jurassic) history of the Blue Mountains province (Oregon and Idaho, USA) using constraints from Cretaceous igneous and sedimentary rocks. The Blue Mountains province consists of the Wallowa and Olds Ferry arcs, separated by forearc accretionary material of the Baker terrane. Four plutons (Lookout Mountain, Pedro Mountain, Amelia, Tureman Ranch) intrude along or near the Connor Creek fault, which separates the Izee and Baker terranes. High-precision U-Pb zircon ages indicate 129.4–123.8 Ma crystallization ages and exhibit a north-northeast–younging trend of the magmatism. -
2. Geophysics and the Structure of the Lesser Antilles Forearc1
2. GEOPHYSICS AND THE STRUCTURE OF THE LESSER ANTILLES FOREARC1 G. K. Westbrook, Department of Geological Sciences, University of Durham and A. Mascle and B. Biju-Duval, Institut Français du Pétrole2 ABSTRACT The Barbados Ridge complex lies east of the Lesser Antilles volcanic arc along the eastern margin of the Caribbean Plate. The complex dates in part from the Eocene, and elements of the arc system have been dated as Late Cretaceous and Late Jurassic, although most of the volcanic rocks date from the Tertiary, particularly the latter part. It is probable that the arc system was moved a considerable distance eastward with respect to North and South America during the Tertiary. The accretionary complex can be divided into zones running parallel to the arc, starting with a zone of initial accre- tion at the front of the complex where sediment is stripped from the ocean floor and the rate of deformation is greatest. This zone passes into one of stabilization where the deformation rate is generally lower, although there are localized zones of more active tectonics where the generally mildly deformed overlying blanket of sediment is significant dis- turbed. Supracomplex sedimentary basins that are locally very thick are developed in the southern part of the complex. The Barbados Ridge Uplift containing the island of Barbados lies at the western edge of the complex; between it and the volcanic arc lies a large forearc basin comprising the Tobago Trough and Lesser Antilles Trough. There are major longitudinal variations in the complex that are broadly related to the northward decrease in sedi- ment thickness away from terrigenous sources in South America and that are locally controlled by ridges in the oceanic igneous crust passing beneath the complex. -
Paleogeography of the Caribbean Region: Implications for Cenozoic Biogeography
PALEOGEOGRAPHY OF THE CARIBBEAN REGION: IMPLICATIONS FOR CENOZOIC BIOGEOGRAPHY MANUEL A. ITURRALDE-VINENT Research Associate, Department of Mammalogy American Museum of Natural History Curator, Geology and Paleontology Group Museo Nacional de Historia Natural Obispo #61, Plaza de Armas, CH-10100, Cuba R.D.E. MA~PHEE Chairman and Curator, Department of Mammalogy American Museum of Natural History BULLETIN OF THE AMERICAN MUSEUM OF NATURAL HISTORY Number 238, 95 pages, 22 figures, 2 appendices Issued April 28, 1999 Price: $10.60 a copy Copyright O American Museum of Natural History 1999 ISSN 0003-0090 CONTENTS Abstract ....................................................................... 3 Resumen ....................................................................... 4 Resumo ........................................................................ 5 Introduction .................................................................... 6 Acknowledgments ............................................................ 8 Abbreviations ................................................................ 9 Statement of Problem and Methods ............................................... 9 Paleogeography of the Caribbean Region: Evidence and Analysis .................. 18 Early Middle Jurassic to Late Eocene Paleogeography .......................... 18 Latest Eocene to Middle Miocene Paleogeography .............................. 27 Eocene-Oligocene Transition (35±33 Ma) .................................... 27 Late Oligocene (27±25 Ma) ............................................... -
Thematic Report for the Insular Caribbean Sub-Region
CLME-TT/3 Prov Barbados, February 2007 Original: English THEMATIC REPORT FOR THE INSULAR CARIBBEAN SUB-REGION A discussion paper for the CLME Synthesis Workshop by Sherry Heileman, Ph.D. CLME Project Implementation Unit Centre for Resource Management and Environmental Studies (CERMES) University of the West Indies Cave Hill Campus, Barbados February 2007 Insular Caribbean - CLME Thematic report CONTENTS 1. INTRODUCTION ................................................................................................................................ 1 2. THE INSULAR CARIBBEAN .......................................................................................................... 1 Geography and oceanography ................................................................................................................... 1 Ecological features..................................................................................................................................... 3 Socio-economic background...................................................................................................................... 5 2.4 Environmental and socio-economic vulnerability of SIDS ................................................................. 6 3. PRIORITY TRANSBOUNDARY PROBLEMS.............................................................................. 7 3.1 Unsustainable exploitation of living marine resources ........................................................................ 8 3.1.1 Description of the problem and justification -
The Appalachian-Ouachita Rifted Margin of Southeastern North America
The Appalachian-Ouachita rifted margin of southeastern North America WILLIAM A. THOMAS* Department of Geology, University of Alabama, Tuscaloosa, Alabama 35487 ABSTRACT component of extension propagated north- rocks of Early and Middle Cambrian age along eastward to form the intracratonic fault the Southern Oklahoma fault system are over- Promontories and embayments along the systems northeast of the transform fault, but stepped by post-rift strata of Late Cambrian age late Precambrian-early Paleozoic Appala- most of the extension of the Ouachita rift was (Ham and others, 1964). The purposes of this chian-Ouachita continental margin of south- transformed along the Alabama-Oklahoma article are to synthesize available data into an eastern North America are framed by a transform fault to the Mid-Iapetus Ridge interpretation of the mechanisms controlling the northeast-striking rift system offset by outboard from the Blue Ridge passive shape of the rifted margin and to consider the northwest-striking transform faults. Inboard margin. implications of differences in age of rifting. from the continental margin, basement fault INTRODUCTION systems have two sets of orientation; one is RIFT-RELATED ROCKS AND northeast parallel with rift segments, and the Late Precambrian-early Paleozoic rifting and STRUCTURES other is northwest parallel with transform opening of the Iapetus (proto-Atlantic) Ocean faults. produced a North American continental margin Blue Ridge Late Precambrian clastic and volcanic syn- along which the late Paleozoic Appalachian- rift rocks overlie Precambrian basement Ouachita orogenic belt subsequently formed General Setting. The Blue Ridge is an elon- rocks along the Appalachian Blue Ridge. (Figs. 1, 2). Several interpretations have con- gate external basement massif (Fig. -
The Application of GIS to the Reconstruction of the Slave-Plantation Economy of St
The Application of GIS to the Reconstruction of the Slave-Plantation Economy of St. Croix, Danish West Indies Daniel Hopkins, Philip Morgan, and Justin Roberts he project of developing a historical-geographical understanding of slavery and the economic and social systems that supported it requires the exploration of primary data sources that have otherwise notT received significant attention. This paper focuses on a remarkable se- ries of maps, cadastral records, and censuses of the island of St. Croix, in the Danish West Indies (now the United States Virgin Islands) which provide uniquely rich materials for the analysis of the workings of an eighteenth-century slave-plantation society. These Danish records are so susceptible to demographic, economic, and cultural analysis, and the information they convey can be so precisely placed within the mapped physical realities of the landscapes of St. Croix, that they may represent a be nchmark for studies of the geography of New World plantation society in general. Atlantic slavery dominated huge agricultural areas, and its profits permeated the European, African, and American economies, to say noth- ing of its cultural implications,1 and research on this tremendously impor- tant subject has proliferated enormously. Most of this work has been published by historians,2 but the dividing line between history—and es- pecially economic history—and geography can of course not be very sharply drawn in the case of the slave-plantation system. Some very solid historical geography of plantation slavery in the Caribbean has been writ- ten, but the field remains quite open.3 The source material is widely scat- tered and by no means uniform or easy to handle, and a great deal of the fundamental record of the geography of slavery doubtless remains to be re- constructed and interpreted. -
Water-Mass Evolution in the Cretaceous Western Interior Seaway of North America and Equatorial Atlantic
Clim. Past, 13, 855–878, 2017 https://doi.org/10.5194/cp-13-855-2017 © Author(s) 2017. This work is distributed under the Creative Commons Attribution 3.0 License. Water-mass evolution in the Cretaceous Western Interior Seaway of North America and equatorial Atlantic James S. Eldrett1, Paul Dodsworth2, Steven C. Bergman3, Milly Wright4, and Daniel Minisini3 1Shell International Exploration & Production B.V, Kesslerpark 1, 2288 GS Rijswijk, the Netherlands 2StrataSolve Ltd, 42 Gaskell Street, Stockton Heath, Warrington, WA4 2UN, UK 3Shell International Exploration and Production Inc, 200 N. Dairy Ashford, Houston, TX 77079, USA 4Chemostrat Inc., 3760 Westchase Drive, Houston, Texas, TX 77042, USA Correspondence to: James S. Eldrett ([email protected]) Received: 1 November 2016 – Discussion started: 25 November 2016 Revised: 4 May 2017 – Accepted: 29 May 2017 – Published: 14 July 2017 Abstract. The Late Cretaceous Epoch was characterized by tion event related to open water-mass exchange and may have major global perturbations in the carbon cycle, the most been complicated by variable contribution of organic matter prominent occurring near the Cenomanian–Turonian (CT) from different sources (e.g. refractory/terrigenous material), transition marked by Oceanic Anoxic Event 2 (OAE-2) requiring further investigation. at 94.9–93.7 Ma. The Cretaceous Western Interior Sea- way (KWIS) was one of several epicontinental seas in which a complex water-mass evolution was recorded in widespread sedimentary successions. This contribution integrates new 1 Introduction data on the main components of organic matter, geochem- istry, and stable isotopes along a north–south transect from The Late Cretaceous Epoch was characterized by sus- the KWIS to the equatorial western Atlantic and Southern tained global warming, emplacement of several large igneous Ocean. -
Caribbean Tsunami Hazard
ESTIMATING THE THREAT OF TSUNAMIGENIC EARTHQUAKES AND EARTHQUAKE INDUCED-LANDSLIDE TSUNAMI IN THE CARIBBEAN WILLIAM R. MCCANN Earth Scientific Consultants Westminster, CO 80021, USA Deformation along the margin of the Caribbean Plate is the principal cause of the tsunami threat in the Caribbean. That margin parallels the northern coast of South America, the Lesser Antilles, and extends along the Greater Antilles from Puerto Rico through Jamaica. The eastern boundary of the Caribbean plate near the Lesser Antilles is the locus of subduction of Atlantic seafloor. At least three distinct, shallow tectonic regimes parallel the margin. They are: an outer tectonic belt where the North America Plate bends to enter the subduction zone, the main interface or zone of contact between the plates, and an inner zone of intraplate activity in the overriding Caribbean Plate. The level of seismic activity and tsunami potential in each of these zones is influenced by the presence of aseismic ridges on the downgoing plate. Ridges may increase the probability of tsunami or slow earthquakes, by reactivating thrust faults in the accretionary prism. The northeastern corner of the Caribbean Plate margin has a smooth transition from the relatively simple subduction zone in the Northern Lesser Antilles into a region of oblique convergence. It is a complex margin dominated by microplate tectonics from near Puerto Rico through Hispaniola. Here too the same three tectonic zones can be defined, but the third zone, “intraplate activity in the Caribbean Plate”, is more clearly delineated as microplate deformation in a wide plate boundary zone. Strike-slip tectonics dominates the region from Haiti westward to the northern coast of Honduras. -
A Simple Synthesis of Caribbean Geology
Transactions of the 16th Caribbean Geological Conference, Barbados. Caribbean Journal of Earth Science, 39 (2005), 69-82. © Geological Society of Jamaica. A simple synthesis of Caribbean geology KEITH H. JAMES Consultant Geologist, Plaza de la Cebada, 3, 09346 Covarrubias (Burgos), Spain, and Honorary Departmental Fellow, Institute of Geography and Earth Sciences, Aberystwyth, Wales, UK. E-mail: [email protected] ABSTRACT. The complex area between the continental masses of North and South America is a collage of many continental, stretched continental, island arc and oceanic elements described by numerous works. Some areas are poorly exposed and not well known. Others are intensely explored and well documented. Syntheses of this geology popularly derive the Caribbean Plate from the Pacific and require major rotation of island arc elements and continental blocks along with major changes in plate migration direction. These models are complex and geometrically unlikely. This paper suggests a simple, in situ evolution from a Pangean configuration principally via regional (North - South America), Jurassic-Late Cretaceous, WNW oriented sinistral transtension, followed by a Palaeocene–Middle Eocene compressional event and Oligocene-Recent, E-W strike-slip between the Caribbean and American Plates. 1. INTRODUCTION southern Guatemala, Honduras, Nicaragua and El Salvador. Extended continental crust forms the The Middle America area of this paper lies northern part of the Gulf of Mexico, the eastern between the continental masses of North and margin of Mexico, the eastern and western South America (Fig. 1). The present-day margins of the Florida Platform, the eastern Caribbean Plate interacts with Atlantic plates to Bahamas Platform and the Nicaragua the north, south and east and with the Nazca and Rise/Jamaica and the Guyana Platform. -
Azuero Peninsula, Panama)
Geologica Acta, Vol.9, N o s 3-4, September - December 2011, 481-498 DOI: 10.1344/105.000001742 Available online at www.geologica-acta.com Geology of the Cerro Quema Au-Cu deposit (Azuero Peninsula, Panama) 1 1 1 1 2 3 1 I. CORRAL A. GRIERA D. GÓMEZ-GRAS M. CORBELLA À. CANALS M. PINEDA-FALCONETT E. CARDELLACH 1 Departament de Geologia, Universitat Autònoma de Barcelona (UAB) 08193 Barcelona, Spain. Corral E-mail: [email protected] Griera E-mail: [email protected] Gómez-Gras E-mail: [email protected] Corbella E-mail: [email protected] Cardellach E-mail: [email protected] 2 Facultat de Geologia, Universitat de Barcelona (UAB) 08028 Barcelona, Spain. Canals E-mail: [email protected] 3 Departamento de Geografía, Universidad de Panamá 082304747, Chitré, Panamá. Pineda-Falconett E-mail: [email protected] ABS TRACT The Cerro Quema district, located on the Azuero Peninsula, Panama, is part of a large regional hydrothermal system controlled by regional faults striking broadly E-W, developed within the Río Quema Formation. This formation is composed of volcanic, sedimentary and volcano-sedimentary rocks indicating a submarine depositional environment, corresponding to the fore-arc basin of a Cretaceous–Paleogene volcanic arc. The structures observed in the area and their tectono-stratigraphic relationship with the surrounding formations suggest a compressive and/or transpressive tectonic regime, at least during Late Cretaceous–Oligocene times. The igneous rocks of the Río Quema Formation plot within the calc-alkaline field with trace and rare earth element (REE) patterns of volcanic arc affinity. -
The Caribbean Epidemiological Network: the Complexities of Developing a Regional Perspective
The Caribbean epidemiological network: the complexities of developing a regional perspective K.-G. DOUGLAS Project Director, Drug Abuse Project, Caribbean Epidemiology Centre, Trinidad and Tobago J. HILLEBRAND Epidemiology Adviser, United Nations Office on Drugs and Crime, Vienna ABSTRACT The present article describes the geographical, political and cultural difficulties involved in developing a regional drug abuse epidemiological network in the Caribbean. Earlier initiatives such as the Caribbean Community Epidemiology Task Force failed owing to a lack of resources. It was not until 1996 that a major success was achieved, when the Plan of Action for Drug Control Coordination and Cooperation in the Caribbean laid the groundwork for the establishment of a comprehensive and sus- tainable effort to control substance abuse in the region through drug demand reduc- tion. In 1997, the Santo Domingo Declaration against Drugs reinforced the recom- mendation of the Barbados Plan of Action and called for the timely implementation of an epidemiological system for substance abuse. Subsequently, member States of the Caribbean Community allocated resources to the Drug Abuse Epidemiological and Surveillance System Project, which is being implemented by the Caribbean Epidemiology Centre. Within the framework of the project, the Caribbean Drug Information Network was launched in 2001; this concentrates on institution-building, training and the development of practical expertise in survey research. In order for the Network to continue its work, it will need further political support, adequate funding and the ability to link its activities to other aspects of demand reduction. Keywords: Caribbean; drug abuse; demand reduction; epidemiology network; regional initiative. Introduction Features of the sector The Caribbean region has a total land area of 700,000 sq km and comprises a number of islands, including those in the Caribbean Sea, along with the Guianas (Guyana, French Guiana and Suriname). -
Bird List E = Endemic EC = Endemic to Caribbean ELA= Endemic to Lesser Antilles ES = Endemic Subspecies NE = Near Endemic NES = Near Endemic Subspecies
Lesser Antilles Prospective Bird List E = Endemic EC = Endemic to Caribbean ELA= Endemic to Lesser Antilles ES = Endemic Subspecies NE = Near Endemic NES = Near Endemic Subspecies West Indian Whistling Duck Dendrocygna arborea EC Black-bellied Whistling Duck Dendrocygna autumnalis Masked Duck Nomonyx dominicus Ring-necked Duck Aythya collaris Greater Scaup Aythya marila Lesser Scaup Aythya affinis Northern Shoveler Spatula clypeata Blue-winged Teal Spatula discors Green-winged Teal Spatula crecca American Wigeon Mareca americana White-cheeked Pintail Spatula bahamensis Northern Pintail Spatula acuta Pied-billed Grebe Podilymbus podiceps Least Grebe Tachybaptus dominicus Feral Rock Pigeon Columba livia Eurasian Collared Dove Streptopelia decaocto Scaly-naped Pigeon Patagioenas squamosa EC White-crowned Pigeon Patagioenas leucocephala Grenada Dove Leptotila wellsi E Bridled Quail-Dove Geotrygon mystacea EC Ruddy Quail-Dove Geotrygon montana Zenaida Dove Zenaida aurita EC Eared Dove Zenaida auriculata Common Ground Dove Columbina passerina Red-billed Tropicbird Phaethon aethereus mesonauta White-tailed Tropicbird Phaethon lepturus White-tailed Nightjar Hydropsalis cayennensis manati St.Lucia Nightjar Antrostomus (rufus) otiosus E Antillean Nighthawk Chordeiles gundlachii ________________________________________________________________________________________________________ WINGS ● 1643 N. Alvernon Way Ste. 109 ● Tucson ● AZ ● 85712 ● www.wingsbirds.com (866) 547 9868 Toll free US + Canada ● Tel (520) 320-9868 ● Fax (520) 320 9373 Lesser