Holocene Climatic Optimum

TBLC

• Mid Holocene lowland forest

• Nipissing transgression in the northern Lake Huron Basin

This forest bed is located at the bottom of Thunder Bay in ten meters of water. Larch stumps are dated ca. 7850-8020 Cal Yrs BP. The site provides evidence on shoreline position of Lake Huron during the onset of the Nipissing transgression in the northern Lake Huron Basin.

SRCW

The site is located on the banks of Salt River in Logan Co., IL. Two pieces of wood were collected by D. Campbell and C. Widga at the exposure of a peat layer associated with the finding of mastodon bones a few year earlier. The speciemns had very few rings to be crossdated. However, potentially this location holds more wood finds.  

SPSL

• Mid Holocene lowland forest

• Nipissing transgression in the southeastern Lake Michigan Basin

SBFP

• Mid Holocene lowland forest

• Nipissing transgression in the northern Lake Michigan Basin

This site is offshore in Lake Michigan near the city of Sturgeon Bay in Door County. Frank Pranschke located and collected over 15 specimens in July 1992 with a diving crew, and samples were identified as white-cedar and spruce. Radiocarbon dates this lowland coniferous stand to ca. 7330-7500 Cal Yrs BP.

LQIP

• Mid Holocene riparian forest

• Younger Dryas riparian forest

• No-analog vegetation from central Illinois

LFSL

• Mid Holocene drowned forest in Lake Huron

• Nipissing transgression in the southern Lake Huron Basin

This is another a Mid Holocene drowned forest bed in the southern Lake Huron located a few miles offshore of Lexington Township, MI. We have only one specimen analyzed from the site sampled with the help of deep-water divers led by Captain Luke Clyburn. It was a pine stump with 98 tree rings. Most likely, this site is similar to the Mid Holocene drown forest at Sanilac site (TBDH/SFDH) located in the vicinity.

FCIP

• Holocene riparian forest at the Oneida watershed, NY

• Records of extreme flooding at Fish Creek, NY

ERIP

• Post-glacial wetlands of southern Lake Superior from 8200 to 6250 cal Yrs BP

• The Houghton Low Stage of the Lake Superior

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