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View north toward basalt dike (photograph EI10) in Hakatai Shale, Unkar Group, on north side of river mile 77.2, at beginning of Hance Rapids. Shinumo Sandstone forms cliff at upper edge of photograph.
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Following an explosion at the Deepwater Horizon drilling rig on April 20, 2010, MC252 an estimated 3.19 million barrels of oil leaked into the Northern Gulf of Mexico over 87 days. The endangered Kemp's ridley sea turtle (Lepidochelys kempii [Lk]) has a long established record of using the area near the well as primary foraging grounds. Resulting short- and long-term negative impacts of the oil spill on sea turtles could induce changes in the health and fitness of the Lk population. MC252 oil is known to have entered the foraging areas. Consequently, stable carbon and nitrogen isotope signatures from MC252 oil should be reflected in the food web and in the tissues of organisms such as sea turtles. We measured carbon...
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View east and upriver toward Unkar Group of rocks, Cardenas Basalt sill (black), Bass Formation (light gray), Hakatai Shale (red), unconformably below overlying Cambrian Tapeats Sandstone, from south side of river mile 134.8.
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(Hyperlink to Official Landing Page for Geospatial Fabric products) The Geospatial Fabric provides a consistent, documented, and topologically connected set of spatial features that create an abstracted stream/basin network of features useful for hydrologic modeling.The GIS vector features contained in this Geospatial Fabric (GF) data set cover the lower 48 U.S. states, Hawaii, and Puerto Rico. Four GIS feature classes are provided for each Region: 1) the Region outline ("one"), 2) Points of Interest ("POIs"), 3) a routing network ("nsegment"), and 4) Hydrologic Response Units ("nhru"). A graphic showing the boundaries for all Regions is provided at http://dx.doi.org/doi:10.5066/F7542KMD. These Regions are identical...


map background search result map search result map GIS Features of the Geospatial Fabric for National Hydrologic Modeling Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P3 from 1983 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P1 from 18 July 1990 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T2 from 1991 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T6 from 1991 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P2 from 09 July 1993 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P3 from 2000 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T6 from 2000 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T8 from 2002 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T9 from 2003 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P1 from 2005 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P4 from 2005 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T4 from 2006 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetlands T6 and T7 from 2011 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetlands T4, T5, T6, and T7 from 2012 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetlands T8 and T9 from 2012 Kemp's ridley sea turtle forage location centroids in the northern Gulf of Mexico, 2010, 2011 and 2012 CS22. View east and upriver toward Unkar Group of rocks CW89. View east toward flood-damaged travertine pools below Havasu Falls EI09. View north toward basalt dike in Hakatai Shale Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T6 from 1991 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T6 from 2000 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P3 from 1983 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T8 from 2002 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T2 from 1991 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T4 from 2006 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland T9 from 2003 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P3 from 2000 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P2 from 09 July 1993 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P1 from 18 July 1990 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetlands T6 and T7 from 2011 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P4 from 2005 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetlands T4, T5, T6, and T7 from 2012 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetland P1 from 2005 Digital Orthorectified Aerial Image of Cottonwood Lake Study Area Wetlands T8 and T9 from 2012 Kemp's ridley sea turtle forage location centroids in the northern Gulf of Mexico, 2010, 2011 and 2012 GIS Features of the Geospatial Fabric for National Hydrologic Modeling