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This composite shaded relief image dataset depicts generalized bathymetry and topography of the Caribbean region.
Categories: Data, pre-SM502.8; Tags: AG, AI, AN, AW, Anguilla, All tags...
The Caribbean region is part of World Energy Assessment region 6 (Central and South America). A fundamental task in the assessment is to map the locations and type of production for existing oil and gas fields. The Petroconsultants database is the only available database that has coverage for the Caribbean region. Oil and gas field symbols represent field center-points and are published with permission from Petroconsultants International Data Corporation, 2002 database.
Categories: Data, pre-SM502.8; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: AG, AI, AN, AW, Anguilla, All tags...
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This part of the release provides an updated georeferenced catalog of limestone boulders and cobbles pertaining to extreme waves on Anegada, a low Caribbean island perched south of the Puerto Rico Trench. Tabulated are 660 limestone clasts, along with clast dimensions and long-axis trend in many instances. Fewer than one-fifth of the clasts were reported previously in https://doi.org/10.1007/s11069-011-9725-8 and https://doi.org/10.1130/GES01356.1. Most were surveyed in 2017.
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This part of the release provides an updated georeferenced catalog of coral boulders and cobbles pertaining to extreme waves on Anegada, a low Caribbean island perched south of the Puerto Rico Trench. The main taxa listed are the boulder star coral Orbicella franksii (37 localities), brain coral Pseudodiploria strigosa (171), elkhorn coral Acropora palmata (36), mustard hill coral Porites astreoides (29).
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This part of the data release provides a slightly expanded georeferenced catalog of field evidence for maximum water levels attained near the south shore of Anegada during 2010 Hurricane Earl, of category 4. The catalog consists of 13 localities observed in February 2011, six months after the hurricane. Wrack of plant fragments was the high-water indicator identified at most of them. Elevations have been estimated by extracting bare-ground elevations from a 2014 lidar survey, and by adjusting for heights above ground to which the wrack extended. The localities include two in eastern Anegada that were not reported in https://doi.org/10.5194/adgeo-38-21-2014).
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This part of the data release lists 18 localities where the shells of the tiger lucine Codakia orbicularis, a large marine bivalve, have been found on Anegada. Typically the shells were encountered a few tens of centimeters below ground in pits dug into sand. Most of the examples listed in the dataset were previously reported in https://doi.org/10.1130/GES01356.l -- field occurrences described p. 322, provenance interpreted p. 324, discordant radiocarbon ages discussed p. 324, and examples illustrated and mapped in Figure A9. The radiocarbon ages from lucines tabulated in this data set range across six radiocarbon centuries.
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This release provides inventories of georeferenced evidence pertaining to extreme waves on Anegada, a low Caribbean island perched south of the Puerto Rico Trench: CORAL BOULDERS AND COBBLES -- Derived offshore, found inland. Boulder star coral Orbicella franksii (37 localities), brain coral Pseudodiploria strigosa (171), elkhorn coral Acropora palmata (36), mustard hill coral Porites astreoides (29). LIMESTONE BOULDERS AND COBBLES -- Derived and found onshore (633). MOLLUSCAN SHELLS -- Queen conch Aliger gigas, discarded by precolonial fishers (12 onshore heaps) and by modern fishers (40 offshore heaps); individual conch shells deposited inland by precolonial sea flood (59); tiger lucine Codakia orbicularis, also...
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This dataset includes a modified subset of polygon features that describe U.S. Geological Survey's defined geologic provinces of the World. Each province has a set of geologic characteristics that distinguish it from surrounding provinces. These characteristics may include dominant lithologies, the age of the strata, and/or structural type. Each province is assigned a unique numeric code and may fall within two or more countries or assessment regions.
Categories: Data, pre-SM502.8; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: AG, AI, AN, AW, Anguilla, All tags...
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This part of the data release provides an updated georeferenced list of radiocarbon ages pertaining to evidence for a catastrophic precolonial sea flood on Anegada, a low Caribbean island perched south of the Puerto Rico Trench. The list contains 64 ages measured on carbonate materials and 3 ages measured on plant fragments. Among the total of 67 ages, 43 are among the 47 ages previously tabulated on page 318 of https://doi.org/10.1130/GES01356.l. The 67 ages exclude those from previous work on deposits attributable to the 1755 Lisbon tsunami (https://doi.org/10.1007/s11069-010-9622-6). Among the 67 ages listed, the 24 ages previously unreported were measured mainly on samples collected in 2017. The main material...
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This part of the release provides an georeferenced list on the most conspicuous of the onshore heaps of harvested conch shells on Anegada, a low Caribbean island perched south of the Puerto Rico Trench. The list locates 12 conch heaps noted in 2017 in the island's East End: Also listed are radiocarbon ages measured on shells from six of the heaps.
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This part of the data release catalogs 40 offshore conch heaps mapped on airphotos and satellite images. Conch shells harvested around Anegada since the start of European colonization, which began late in the 18th century C.E., have been discarded in piles south of the southeastern part of the island, in the Caribbean Sea. Storm waves have notched some of these heaps and have flattened others. The catalog is based on interpretation of airphotos taken 2002 and of satellite images, accessed on Google Earth, taken in 2011–2019. Some of the offshore heaps were observed by boat in 2012, 2015, 2017, and (or) 2018. Repeat visits provided evidence for beveling during the hurricane season of 2017.
This dataset describes faults and structural features of the Caribbean region (Anguilla, Antigua and Barbuda, Aruba, Bahamas, Barbados, Belize, British Virgin Islands, Cayman Islands, Colombia, Costa Rica, Cuba, Dominica, Dominican Republic, El Salvador, Grenada, Guadeloupe, Guatemala, Guyana, Haiti, Honduras, Jamaica, Martinique, Mexico, Montserrat, Netherlands Antilles, Nicaragua, Panama, Puerto Rico, St. Kitts and Nevis, St. Lucia, St. Vincent and the Grenadines, Trinidad and Tobago, Turks and Caicos Islands, United States, Venezuela, and the Virgin Islands (named countries may not be completely shown on map)).
Categories: Data, pre-SM502.8; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: AG, AI, AN, AW, Age, All tags...
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This part of the data release aids in identifying places where land-clearing and wall-building, rather than a sea flood, may account for anomalous boulders and cobbles of Pleistocene limestone on Anegada. The wall shapefile delineates much of a network of walls found mainly on the east half of the island. It can be plotted in GIS with the shapefile of limestone clasts, most of which form boulder fields that trail southward from limestone knolls, promontories, and other outcrops. The comparison shows that these clast fields are most abundant on low ground in and near salt ponds, while the walls run mostly on higher ground.
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This part of the release provides an updated georeferenced catalog of strewn conch shells pertaining to extreme waves on Anegada, a low Caribbean island perched south of the Puerto Rico Trench. Three of the listed fragments were found whole, lacking any extraction hole from fishing. Others listed each contained a round hole from extraction of the meat in precolonial time. Still others were found too fragmentary to show whether they had been fished. Most of the fished shells listed are from the East End of Anegada. There, the listed shells in the south are near heaps of fished conchs, while the shells in the north rim an area of two hectares or more across which conch shells are strewn.
This dataset includes polygons that describe the geologic age of surface outcrops of bedrock of the Caribbean region (Anguilla, Antigua and Barbuda, Aruba, Bahamas, Barbados, Belize, British Virgin Islands, Cayman Islands, Colombia, Costa Rica, Cuba, Dominica, Dominican Republic, El Salvador, Grenada, Guadeloupe, Guatemala, Guyana, Haiti, Honduras, Jamaica, Martinique, Mexico, Montserrat, Netherlands Antilles, Nicaragua, Panama, Puerto Rico, St. Kitts and Nevis, St. Lucia, St. Vincent and the Grenadines, Trinidad and Tobago, Turks and Caicos Islands, United States, Venezuela, and the Virgin Islands (named countries may not be completely shown on map)).
Categories: Data, pre-SM502.8; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: AG, AI, AN, AW, Age, All tags...
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May sea floods contaminate Anegada groundwater by entering a freshwater aquifer through sink holes? Groundwater provides the island's main naturally available source of freshwater. Robert Schomburgk in 1832 reported natural wells provided by holes in limestone (https://library.iucn-isg.org/documents/1832/Schomburgk_1832_The_Journal_of_the_Royal_Geographical_Society_of_London.pdf). Today, sinks in the limestone are readily mapped today in lidar topography. The dataset here identifies 1,508 closed topographic depressions. Several holding water were examined during field work in 2008–2017. The water level in them was close to mean sea level, as estimated from differences between lidar elevations of rims and depths...
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This part of the data release provides an updated georeferenced guide to the main unit of Holocene sand ascribed to a sea flood on Anegada. Much of the data was previously summarized in Figure A4 of https://doi.org/10.1130/GES01356.1 . Plotted here, on the accompanying map, are all 573 localities in the updated compilation —nearly half of which do not provide much if any evidence for marine inundation. The main attribute of each locality is one of four summary categories: Pervasive—Sand covers more than 3/4 of area and typically thicker than 5 cm (132 localities). Patchy—Sand covers less than 3/4 of area and typically thinner than 5 cm (185 localities). Scant—Called “Sand scarce or absent” in https://doi.org/10.1130/GES01356.1...
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This part of the release provides an updated list of places on Anegada, none of them more than 0.5 m above sea level, where observed sandy deposits may represent the Lisbon tsunami of 1755 C.E. These places were previously plotted in Figure A3 of https://doi.org/10.1130/GES01356.1, a paper in which the Lisbon tsunami is inferred to have had minor effects on Anegada compared with a sea flood a few centuries earlier. Details about the low, probable Lisbon deposits were previously reported in https://doi.org/10.1007/s11069-010-9622-6 (stratigraphy), https://doi.org/10.1007/s11069-011-9730-y (molluscan paleontology), and https://doi.org/10.1007/s11069-010-9706-3 (foraminifera).
    map background search result map search result map Oil and Gas Fields of the Caribbean Region, 2004 (fld6bg) Faults of the Caribbean Region (flt6bg) Surface Geology of the Caribbean Region (geo6bg) Geologic Provinces of the Caribbean Region, 2004 (prv6bg) Shaded Relief Image of the Caribbean Region (shadedrelief.jpg) Field evidence noted in 2008 to 2023 that pertains to sea floods of the past millennium on Anegada, British Virgin Islands Fished conch shells in modern heaps noted in 2012 to 2018 that were largely reshaped by storm waves offshore Anegada, British Virgin Islands Onshore conch heaps noted in 2012 to 2018 that pertain to sea floods of the past 1,000 years on Anegada, British Virgin Islands Strewn conch shells noted in 2008 to 2017 that pertain to sea floods of the past 1,000 years on Anegada, British Virgin Islands Coral clasts noted in 2008 to 2017 that pertain to sea floods of the past 1,000 years on Anegada, British Virgin Islands Field traces in February 2011 of high-water levels from 2010 Hurricane Earl, as calibration for sea floods of the past 1,000 years on Anegada, British Virgin Islands Limestone boulders and cobbles noted 2009 to 2017 that pertain to sea floods of the past 1,000 years on Anegada, British Virgin Islands Strewn shells of a large marine bivalve noted 2008 to 2017 on Anegada, British Virgin Islands Radiocarbon ages measured 2011 to 2021 on corals, shells, and plant fragments pertaining to sea floods of the past 1,000 years on Anegada, British Virgin Islands Low-lying sandy deposit observed 2008 to 2013 and dated to later than 1650 C.E. on Anegada, British Virgin Islands Presence and absence of a widespread unit of Holocene marine sand observed in 2008 to 2017 in tsunami-hazard assessments on Anegada, British Virgin Islands Closed depressions in 2014 lidar topography in areas of Pleistocene limestone on Anegada, British Virgin Islands Rock walls mapped from 2002 airphotos and 2014 lidar topography of Anegada, British Virgin Islands Onshore conch heaps noted in 2012 to 2018 that pertain to sea floods of the past 1,000 years on Anegada, British Virgin Islands Low-lying sandy deposit observed 2008 to 2013 and dated to later than 1650 C.E. on Anegada, British Virgin Islands Field traces in February 2011 of high-water levels from 2010 Hurricane Earl, as calibration for sea floods of the past 1,000 years on Anegada, British Virgin Islands Fished conch shells in modern heaps noted in 2012 to 2018 that were largely reshaped by storm waves offshore Anegada, British Virgin Islands Field evidence noted in 2008 to 2023 that pertains to sea floods of the past millennium on Anegada, British Virgin Islands Oil and Gas Fields of the Caribbean Region, 2004 (fld6bg) Faults of the Caribbean Region (flt6bg) Surface Geology of the Caribbean Region (geo6bg) Shaded Relief Image of the Caribbean Region (shadedrelief.jpg) Geologic Provinces of the Caribbean Region, 2004 (prv6bg)