This data release includes data collected in the pursuit of identifying pre- and post-colonial riparian ecosystems found throughout Anne Arundel County, Maryland, USA. A single raster file is included, and represents a topological classification of the entire county according to a hydrologically conditioned Digital Elevation Model (DEM). Ten shapefiles are also included, nine of which represent the depths of various soil layers as identified by ground-penetrating radar for two detailed study sites within Anne Arundel County. A tenth documents the depths cored at both detailed study sites, and their spatial locations. Finally, twenty comma-delimited tables are included in this release with fifteen tables documenting pollen records at various depths identified within sediment samples taken throughout the country's flood plains. The remaining five tables include the following: general summary information for all sample sites; radiocarbon dates associated with woody material within the sediment cores; morphological information identifying tree species found buried in-situ throughout the county; visible, near-infrared, and X-Ray Fluorescence (XRF) information associated with each core; and a data dictionary for the previous information.

This data release includes data collected in the pursuit of identifying pre- and post-colonial riparian ecosystems found throughout Anne Arundel County, Maryland, USA. Two comma-delimited tables are included. The first documents pollen records at various depths identified within sediment samples taken throughout the county's floodplains. The other describes morphological information identifying tree species found buried in-situ throughout the county.

This data release includes data collected in the pursuit of identifying pre- and post-colonial riparian ecosystems found throughout Anne Arundel County, Maryland, USA. Two comma-delimited tables are included. The first documents pollen records at various depths identified within sediment samples taken throughout the county's floodplains. The other describes morphological information identifying tree species found buried in-situ throughout the county.

This data release includes data collected in the pursuit of identifying pre- and post-colonial riparian ecosystems found throughout Anne Arundel County, Maryland, USA. The single shapefile included documents the depths cored at both detailed study sites, and their spatial locations. Seventeen comma-delimited tables are included. Fourteen record pollen records at various depths identified within sediment cores taken at this study's two detailed investigation sites: Main Creek, near Pasadena, MD, and Bacon Ridge Branch, near Crownsville, MD. The remaining three include: radiocarbon dates associated with woody material identified in these sediment cores, visible, near-infrared, and X-ray Fluorescence (XRF) information associated with each sediment core respectively, and a data dictionary for the visible, near-infrared, and XRF data for clarity.

This data release includes data collected in the pursuit of identifying pre- and post-colonial riparian ecosystems found throughout Anne Arundel County, Maryland, USA. The single shapefile included documents the depths cored at both detailed study sites, and their spatial locations. Seventeen comma-delimited tables are included. Fourteen record pollen records at various depths identified within sediment cores taken at this study's two detailed investigation sites: Main Creek, near Pasadena, MD, and Bacon Ridge Branch, near Crownsville, MD. The remaining three include: radiocarbon dates associated with woody material identified in these sediment cores, visible, near-infrared, and X-ray Fluorescence (XRF) information associated with each sediment core respectively, and a data dictionary for the visible, near-infrared, and XRF data for clarity.

This data release is part of a larger data release including data collected in the pursuit of identifying pre- and post-colonial riparian ecosystems found throughout Anne Arundel County, Maryland, USA. A single raster file is included, and represents a topological classification of the entire county according to a hydrologically conditioned Digital Elevation Model (DEM). These data were generated through the use of r.geomorphon, a GRASS GIS toolkit, to classify local terrain conditions into one of ten distinct landforms called geomorphons.

This data release is part of a larger data release including data collected in the pursuit of identifying pre- and post-colonial riparian ecosystems found throughout Anne Arundel County, Maryland, USA. A single raster file is included, and represents a topological classification of the entire county according to a hydrologically conditioned Digital Elevation Model (DEM). These data were generated through the use of r.geomorphon, a GRASS GIS toolkit, to classify local terrain conditions into one of ten distinct landforms called geomorphons.

The Cabin Branch and Cabin Creek (Cappy Avenue) outcrops are located along two small creeks in Prince George’s County, Maryland. The Cabin Branch outcrop contains exposures of silty sands of the Upper Cretaceous Severn Formation, and both outcrops contain Paleocene silty quartz and glauconitic sands of the Danian Brightseat Formation and highly fossiliferous glauconitic quartz sands of the Selandian Aquia Formation. Data from these two locations were generated in order to designate a Principal Reference Section for the Danian age Brightseat Formation. The Cabin Branch outcrop consists of disjunct exposures along an approximately 0.4-mile section of the creek. At the nearby Cabin Creek (Cappy Avenue) outcrop a more complete Brightseat/Aquia contact is exposed. Data generated from these two outcrops include a complete suite of sand/silt/clay percent abundances from each sample of each formation. Additionally, data for the sand-size fraction from each formation were further broken down into percent abundance of very fine, fine, medium, and coarse components. Petrographic data for the indurated beds at the Cabin Branch outcrop are also included. Calcareous nannofossil data from the two outcrops are presented in three occurrence charts: one for the Late Cretaceous and one for the Paleocene at Cabin Branch, and one for the Brightseat-Aquia contact interval at Cabin Creek (Cappy Avenue). Calcareous nannofossil data were used to determine the ages and zonation of each formation, and species richness, a measure used to detail community stability, is also provided. In addition to calcareous nannofossil biostratigraphy, samples were processed for other calcareous microfossils: planktic and benthic foraminifera and ostracods. A table for each outcrop presents the number of planktic and benthic foraminifera per 300 specimens, along with the total number of ostracods present per sample. An occurrence chart of ostracod species is provided for both outcrops.

The Cabin Branch and Cabin Creek (Cappy Avenue) outcrops are located along two small creeks in Prince George’s County, Maryland. The Cabin Branch outcrop contains exposures of silty sands of the Upper Cretaceous Severn Formation, and both outcrops contain Paleocene silty quartz and glauconitic sands of the Danian Brightseat Formation and highly fossiliferous glauconitic quartz sands of the Selandian Aquia Formation. Data from these two locations were generated in order to designate a Principal Reference Section for the Danian age Brightseat Formation. The Cabin Branch outcrop consists of disjunct exposures along an approximately 0.4-mile section of the creek. At the nearby Cabin Creek (Cappy Avenue) outcrop a more complete Brightseat/Aquia contact is exposed. Data generated from these two outcrops include a complete suite of sand/silt/clay percent abundances from each sample of each formation. Additionally, data for the sand-size fraction from each formation were further broken down into percent abundance of very fine, fine, medium, and coarse components. Petrographic data for the indurated beds at the Cabin Branch outcrop are also included. Calcareous nannofossil data from the two outcrops are presented in three occurrence charts: one for the Late Cretaceous and one for the Paleocene at Cabin Branch, and one for the Brightseat-Aquia contact interval at Cabin Creek (Cappy Avenue). Calcareous nannofossil data were used to determine the ages and zonation of each formation, and species richness, a measure used to detail community stability, is also provided. In addition to calcareous nannofossil biostratigraphy, samples were processed for other calcareous microfossils: planktic and benthic foraminifera and ostracods. A table for each outcrop presents the number of planktic and benthic foraminifera per 300 specimens, along with the total number of ostracods present per sample. An occurrence chart of ostracod species is provided for both outcrops.

Pollen and geochronological data from sediment core DS-49 were generated in support of research on long-term patterns of vegetation, fire, and climate in Great Dismal Swamp National Wildlife Refuge (Willard et al., in review: IP-143520). Raw counts of pollen data are provided. These data represent new counts from a core collected by Donald R. Whitehead in 1961 and previously presented in Whitehead, 1972. Calibrated and uncalibrated radiocarbon dates were used to develop age models for analyses by Willard et al, in review).