| G535: Quaternary Geology Mike O'Neal discusses merits of morning coffee and continental moraines from top of Pine Valley ski area on the northern edge of the Valpariaso moraine, near Lake Michigan. View to ENE. Bald Mountain sand dune, SE of Michigan City (in Background). Note Student digging along curving buried Holocene soil.
Closeup of buried Holocene soil at Bald Mtn. Tenaya the wonder dog helps expose soil pit.
Soil pit in Holocene soil exposes organic-rich A-horizon grading into B and C horizons. |
![]() Raised Holocene lake beds exposed beneath dune deposits, Indiana Dunes National Lakeshore.
Small-scale surface failure and debris flow related to seepage of groundwater between fine-grain lake sediments and overlying dune sands.
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