{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Bruce G Campbell", "hasEmail": "mailto:bcampbell@usgs.gov"}, "description": "The data set pp1773_extents contains polygon datasets that represent the areal extents of each of the 16 hydrogeologic \nunits of the of the Atlantic Coastal Plain of North and South Carolina. [The total areal extent includes a small area in \nsoutheastern Virginia, the Atlantic Coastal Plain within North Carolina and South Carolina, and a region in southeast \nGeorgia within the Atlantic Coastal Plain.] Each hydrogeological unit is referred to as its model layer number as \nrepresented in the report PP1773. For clarity, they are listed below along with the aquifer unit or confining unit name \nin North Carolina and its correlated unit name in South Carolina. \n\t\t\t\nL1 \tSurficial aquifer \nL2 \tYorktown confining unit / Upper Floridan confining unit \nL3 \tYorktown aquifer / Upper Floridan aquifer \nL4 \tCastle Hayne - Pungo River confining unit / Middle Floridan confining unit \n\t(To be referred to as \"Castle Hayne / Middle Floridan confining unit\" in this document) \nL5 \tCastle Hayne - Pungo River aquifer / Middle Floridan aquifer \n\t(To be referred to as \"Castle Hayne - Middle Floridan aquifer\" in this document) \nL6 \tBeaufort confing unit / Gordon confining unit \nL7 \tBeaufort aquifer / Gordon aquifer \nL8 \tPeedee confining unit / Crouch Branch confining unit \nL9 \tPeedee aquifer / Crouch Branch aquifer \nL10 \tBlack Creek confining unit / McQueen Branch confining unit \nL11 \tBlack Creek aquifer / McQueen Branch aquifer \nL12 \tUpper Cape Fear confining unit / Charleston confining unit \nL13 \tUpper Cape Fear aquifer / Charleston aquifer \nL14 \tLower Cape Fear confining unit / Gramling confining unit \nL15 \tLower Cape Fear aquifer / Gramling aquifer \nL16 \tLower Cretaceous confining unit and aquifer \n\t\t\t\nSpatial data set pp1773_layer1_extent represents the extent of the top of the surficial aquifer, \nwhich is Layer 1 in the groundwater model used to simulate the aquifer system described in \nPP 1773. The surficial aquifer is the uppermost aquifer. It is an unconfined aquifer that is \nuniformly present except where it is incised by streams. The top of the surficial aquifer is \nequivalent to the land surface. The extent was derived primarily by geologic and hydraulic \nproperties, as the surficial aquifer is an unconfined layer primarily composed of sediments \nof Quaternary age, plus some older sediments in areas due to a different stratigraphic \nposition of the first underlying confining layer. \n\t\t\t\nSpatial data set pp_1773_layer_2 is the Yorktown/Upper Floridan confining unit. It is not \ncomposed of a single unit because the unit's series of clay and silt beds vary greatly in \nstratigraphic position. \n\t\t\t\nSpatial dataset pp1773_layer3_extent represents the extent of the Yorktown/Upper Floridan \naquifer. The Yorktown aquifer is present only in the northern half of the North Carolina Coastal \nPlain. Outliers exist in Robeson, Bladen and Dublin counties, but are not separated from the \nsurficial aquifer by a confining unit, and not considered a distinct aquifer in these areas. The \nUpper Floridan aquifer extent covers a southern portion of South Carolina and southern portion \nof Georgia. \n\t\t\t\nSpatial dataset pp1773_layer4_extent represents the extent of the Castle Hayne/Middle Floridan \nconfining unit. The Castle Hayne confining unit consists of beds of clay and silt that vary in \nstratigraphic position and are absent in a number of areas in the central and southern North \nCarolina Coastal Plain. The Middle Floridan confining unit extends from South Carolina to \nsouthern Georgia. It is not continuous with the Castle Hayne confining unit. \n\t\t\t\nSpatial dataset pp1773_layer5_extent represents the extent of the Castle Hayne/Middle \nFloridan aquifer. The Castle Hayne aquifer is located in the central and southern North Carolina \nCoastal Plain; the Middle Floridan aquifer is more south, in southern South Carolina and southern \nGeorgia. \n\t\t\t\nSpatial dataset pp1773_layer6_extent represents the extent of the Beaufort/Gordon confining unit. \nThe Beaufort confining unit is located in northeastern North Carolina and southeastern Virginia. \nIt is best developed in North Carolina, and contains areas where it has eroded or pinches out. \nThe Gordon confining unit is located in southern South Carolina and southeastern Georgia. \n\t\t\t\nSpatial dataset pp1773_layer7_extent represents the extent of the Beaufort/Gordon aquifer unit. \nThe Beaufort aquifer, in northeastern North Carolina and southeastern Virginia, and the Gordon \naquifer, in southeastern South Carolina and southeastern Georgia, are not continuous or \nhydraulically connected. \n\t\t\t\nSpatial dataset pp1773_layer8_extent represents the extent of the Peedee/Crouch Branch \nconfining unit. The Peedee/Crouch Branch confining unit is positioned stratigraphically near \nthe contact of the Paleocene Beaufort and Late Cretaceous Peedee Formations in the eastern \nNorth Carolina Coastal Plain, from southeastern North Carolina down to southern Georgia. \n\t\t\t\nSpatial dataset pp1773_layer9_extent represents the extent of the Peedee/Crouch Branch \naquifer. The Peedee/Crouch Branch aquifer is positioned in southeastern North Carolina, \nencompasses all of the Atlantic Coastal Plain in South Carolina, and parts of southeastern \nGeorgia. \n\t\t\t\nSpatial dataset pp1773_layer10_extent represents the extent of the Black Creek/McQueen \nBranch confining unit. The areal extent of this unit includes much of North Carolina within the \nAtlantic Coastal Plain, all of South Carolina within the Atlantic Coastal Plain, and a region in \nsoutheast Georgia within the Atlantic Coastal Plain. \n\t\t\t\nSpatial dataset pp1773_layer11_extent represents the extent of the Black Creek/McQueen \nBranch aquifer. The areal extent of this unit includes northeastern parts of North Carolina \nwithin the Atlantic Coastal Plain, most South Carolina within the Atlantic Coastal Plain, \nand a region in southeast Georgia within the Atlantic Coastal Plain. Black Creek and \nMcQueen Branch aquifers are hydraulically connected. \n\t\t\t\nSpatial dataset pp1773_layer12_extent represents the extent of the Upper Cape Fear/Charleston \nconfining unit. The areal extent of this unit includes a small area in southeastern Virginia, much of \nNorth Carolina within the Atlantic Coastal Plain, part of South Carolina within the Atlantic Coastal \nPlain, and a region in southeast Georgia within the Atlantic Coastal Plain. \n\t\t\t\nSpatial dataset pp1773_layer13_extent represents the extent of the Upper Cape Fear/Charleston \naquifer unit. The areal extent of this unit includes a small area in southeastern Virginia, much of North \nCarolina within the Atlantic Coastal Plain, part of South Carolina within the Atlantic Coastal Plain, and \na region in southeast Georgia within the Atlantic Coastal Plain. Upper Cape Fear and Charleston aquifer \nunits are hydraulically connected. \n\t\t\t\nSpatial dataset pp1773_layer14_extent represents the extent of the Lower Cape Fear/Gramling confining \nunit. The areal extent of this unit includes a small area in southeastern Virginia, much of North Carolina \nwithin the Atlantic Coastal Plain, part of South Carolina within the Atlantic Coastal Plain, and a region in \nsoutheast Georgia within the Atlantic Coastal Plain. \n\t\t\t\nSpatial dataset pp1773_layer15_extent represents the extent of the Lower Cape Fear/Gramling aquifer unit. \nThe areal extent of this unit includes a small area in southeastern Virginia, much of North Carolina within the \nAtlantic Coastal Plain, part of South Carolina within the Atlantic Coastal Plain, and a region in southeast \nGeorgia within the Atlantic Coastal Plain. Lower Cape Fear/Gramling aquifer units are hydraulically connected. \n\t\t\t\nSpatial dataset pp1773_layer16_extent represents the extent of the Lower Cretaceous aquifer unit. The areal \nextent of this unit includes a small area in southeastern Virginia and northeastern North Carolina within the \nAtlantic Coastal Plain. Based on available information, it is not possible to determine the position and extent \nof an intervening confining unit between the Lower Cape Fear and Lower Cretaceous aquifers.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9NXSGN1", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.22488cbd-e936-45e5-8a42-2f10706807ef.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_22488cbd-e936-45e5-8a42-2f10706807ef", "keyword": ["Atlantic Coastal Plain", "Georgia", "North Carolina", "South Carolina", "USGS:22488cbd-e936-45e5-8a42-2f10706807ef", "Virginia", "aquifer", "confining unit", "environment", "geoscientificInformation", "groundwater", "groundwater availability", "groundwater modeling", "hydrogeologic framework", "hydrogeologic modeling", "hydrogeology", "inlandWaters", "surficial aquifer"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-83.310243915, 31.218516725, -75.429738739, 37.588308642", "theme": ["geospatial"], "title": "Extents of the aquifer and confining units of the Atlantic Coastal Plain of North and South Carolina aquifer system (pp1773_extents)"}