thumbnail

Map of surficial deposits and materials in the eastern and central United States (east of 102 degrees West longitude)

IMAP 2789

By:
, ,

Links

Abstract

This data set contains surficial geologic units in the Eastern and Central United States, as well as a glacial limit line showing the position of maximum glacial advance during various geologic time periods. The geologic units represent surficial deposits and other surface materials that accumulated or formed during the past 2+ million years, such as soils, alluvium, and glacial deposits. These surface materials are referred to collectively by many geologists as regolith, the mantle of fragmented and generally unconsolidated material that overlies the bedrock foundation of a continent. This data set and the printed map produced from it, U.S. Geological Survey (USGS) Geologic Investigation Series I-2789, were based on 31 published maps in the USGS's Quaternary Geologic Atlas of the United States map series (USGS Miscellaneous Investigations Series I-1420). The data were compiled at 1:1,000,000 scale, to be viewed as a digital map at 1:2,000,000 nominal scale and to be printed as a conventional paper map at 1:2,500,000 scale.

Geospatial Extents

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Map of surficial deposits and materials in the eastern and central United States (east of 102 degrees West longitude)
Series title:
IMAP
Series number:
2789
ISBN:
0607893699
Edition:
-
Year Published:
2003
Language:
ENGLISH
Description:
1 map : col. ; 116 x 117 cm., on sheet 121 x 130 cm., folded in envelope 30 x 24 cm. + 1 pamphlet (46 p. ; 28 cm.)
Scale:
2500000