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snippet: Quaternary Geologic Map of Connecticut and Long Island Sound portrays the glacial and postglacial deposits with an emphasis on where and how they were emplaced.
summary: Quaternary Geologic Map of Connecticut and Long Island Sound portrays the glacial and postglacial deposits with an emphasis on where and how they were emplaced.
extent: [[-73.7713779632421,40.7501202573446],[-71.7813654997307,42.0526205712792]]
accessInformation: USGS, CT DEEP
thumbnail: thumbnail/thumbnail.png
typeKeywords: ["Data","Service","Map Service","ArcGIS Server"]
description: The Quaternary Geologic Map of Connecticut and Long Island Sound Basin (Stone and others, 2005) portrays the glacial and postglacial deposits of Connecticut (including Long Island Sound) with an emphasis on where and how they were emplaced. Glacial Ice-Laid Deposits (thin till, thick till, and deposits of individual end moraines), Early Postglacial Deposits (Late Wisconsinan to Early Holocene stream terrace and inland dune deposits) and Holocene Postglacial Deposits (alluvium, swamp deposits, marsh deposits, beach and dune deposits, talus, and artificial fill) are differentiated from Glacial Meltwater Deposits. This mapping is based on the concept of systematic northward retreat of the Late Wisconsinan glacier. Meltwater deposits are divided into six depositional system categories (Deposits of Major Ice-Dammed Lakes, Deposits of Major Sediment-Dammed Lakes, Deposits of Related Series of Ice-Dammed Ponds, Deposits of Related Series of Sediment-Dammed Ponds, Deposits of Proximal Meltwater Streams, and Deposits of Distal Meltwater Streams) based on the arrangement and character of the groupings of sedimentary facies (morphosequences). Connecticut Quaternary Geology is 1:24,000-scale data suitable for geologic and environmental mapping and analysis purposes. Not intended for maps printed at map scales greater or more detailed than 1:24,000 scale (1 inch = 2,000 feet.). Not intended for analysis with other digital data compiled at scales greater than or more detailed than 1:24,000 scale. The Long Island Sound data was mapped at 1:80,000 scale using seismic reflection data.
licenseInfo: The data is suitable for use at appropriate scale, and is not recommended for use with other data layers having source map scales greater than 1:24,000 (1 inch = 2000 feet) or printed on maps at scales greater or more detailed than 1:24,000 scale (1 inch = 2,000 feet). The geologic contacts are considered accurate as mapped at 1:24,000 scale. While it may be desirable to represent the geology at a larger scale for site-specific applications, keep in mind that 1:24,000-scale accuracy may not be appropriate for such uses.
catalogPath:
title: Quaternary Geologic Map of Connecticut and Long Island Sound Basin
type: Map Service
url:
tags: ["Geology","Quaternary Geology","Connecticut","Long Island Sound"]
culture: en-US
name: Quaternary_Geology
guid: 1CF949A8-B0A6-4C51-A6E9-441AFBBDA773
spatialReference: WGS_1984_Web_Mercator_Auxiliary_Sphere