Sediments on the Shelf off Southern New England (GARRISON66 shapefile)

The sediments and geomorphology of a portion of the northeastern continental shelf between Hudson Canyon and Georges Bank have been investigated. Wave-cut terraces at 13, 45, 65, and 80 fathoms indicate four former low sea levels, while concentrations of beach ridges around 35 fathoms reveal a fifth. The pre-Holocene drainage pattern, still exposed over part of the area, shows that Block Channel was the main stream system which drained most of southern New England. The surface sediments on the western part of the study area are Late Pleistocene fluvial deposits. Overlying these coarse deposits in the central part of the outer shelf is a sandy silt facies that is also relict. The youngest facies and the only area of present deposition, is in the northeastern part where sand eroded from Nantucket Shoals is being deposited on the shelf.

Data and Resources

Field Value
accessLevel public
bureauCode {010:12}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
datagov_dedupe_retained 20220721172003
identifier USGS:2c8ce206-8d15-4d40-b2f3-6172db3ea223
metadata_type geospatial
modified 20211116
old-spatial {"type": "Polygon", "coordinates": [[[-72.447000, 39.533000], [-72.447000, 40.970000], [ -69.467000, 40.970000], [ -69.467000, 39.533000], [-72.447000, 39.533000]]]}
publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash bebc14bdfaf58d4cc77a229f3ca8af6165588838
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-72.447000, 39.533000], [-72.447000, 40.970000], [ -69.467000, 40.970000], [ -69.467000, 39.533000], [-72.447000, 39.533000]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • atlantic
  • block-island
  • ckan
  • cmgp
  • coastal-and-marine-geology-program
  • continental-shelf
  • cores
  • geo
  • geographic-information-system
  • georges-bank
  • geoscientificinformation
  • geospatial-datasets
  • geoss
  • gis
  • grabs
  • grain-size-analysis
  • lithology
  • location
  • marine-geology
  • nantucket-shoals
  • national
  • navigational-data
  • new-england
  • north-america
  • oceans
  • open-file-report-03-001
  • point-shapefile
  • points
  • rhode-island-sound
  • sea-floor-characteristics
  • sediment-classification
  • sediments
  • surficial-classification
  • texture
  • u-s-east-coast
  • u-s-geological-survey
  • united-states
  • usgs
  • usgs-2c8ce206-8d15-4d40-b2f3-6172db3ea223
  • whsc
  • woods-hole-field-center
isopen False
license_id notspecified
license_title License not specified
maintainer Lawrence J. Poppe
maintainer_email lpoppe@usgs.gov
metadata_created 2025-11-20T21:55:34.467234
metadata_modified 2025-11-20T21:55:34.467238
notes The sediments and geomorphology of a portion of the northeastern continental shelf between Hudson Canyon and Georges Bank have been investigated. Wave-cut terraces at 13, 45, 65, and 80 fathoms indicate four former low sea levels, while concentrations of beach ridges around 35 fathoms reveal a fifth. The pre-Holocene drainage pattern, still exposed over part of the area, shows that Block Channel was the main stream system which drained most of southern New England. The surface sediments on the western part of the study area are Late Pleistocene fluvial deposits. Overlying these coarse deposits in the central part of the outer shelf is a sandy silt facies that is also relict. The youngest facies and the only area of present deposition, is in the northeastern part where sand eroded from Nantucket Shoals is being deposited on the shelf.
num_resources 2
num_tags 43
title Sediments on the Shelf off Southern New England (GARRISON66 shapefile)