Geologic map of the Big Delta A-4 Quadrangle, Alaska
Description
This map illustrates extents and types of unconsolidated deposits and bedrock in the Big Delta A-4 Quadrangle, Alaska. This map is based on field observations begun by P�w� in 1949 and by Reger in 1976. Unit characteristics and extents were determined during field visits and by interpreting 1:40,000-scale black-and-white aerial photographs taken in August 1949 and 1:63,360-scale, false-color infrared aerial photographs taken in July 1978, August 1980, and August 1981.
Resources
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CSDGM IMPORT ERROR: No digtinfo/formcont |
http://dx.doi.org/10.14509/2869 |
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CSDGM IMPORT ERROR: No digtinfo/formcont |
http://dx.doi.org/10.14509/2869 |
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http://dx.doi.org/10.14509/2869 |
Tags
- cenozoic
- paleozoic
- big delta quadrangle
- pleistocene
- radiocarbon dating
- quaternary
- outwash
- loess
- holocene
- tanana river
- geology
- silt
- jarvis creek ash
- big delta
- glaciation
- till
- surficial geology
- alaska range
- delta river
- alluvium
- tephra
- precambrian
- permafrost