Bedrock and Glacial History and Geomorphology of Long Island and Southern Connecticut By Drew...
-
Upload
jason-cook -
Category
Documents
-
view
214 -
download
0
Transcript of Bedrock and Glacial History and Geomorphology of Long Island and Southern Connecticut By Drew...
![Page 1: Bedrock and Glacial History and Geomorphology of Long Island and Southern Connecticut By Drew Martzolf.](https://reader036.fdocuments.us/reader036/viewer/2022070403/56649f325503460f94c4df84/html5/thumbnails/1.jpg)
Bedrock and Glacial History and Geomorphology of Long Island and
Southern Connecticut
By Drew Martzolf
![Page 2: Bedrock and Glacial History and Geomorphology of Long Island and Southern Connecticut By Drew Martzolf.](https://reader036.fdocuments.us/reader036/viewer/2022070403/56649f325503460f94c4df84/html5/thumbnails/2.jpg)
Coastal Connecticut & Long Island• High economic importance• Home to millions of people• Significant ecological value• Current threats:– Coastal erosion– Rising sea levels– Pollution
![Page 3: Bedrock and Glacial History and Geomorphology of Long Island and Southern Connecticut By Drew Martzolf.](https://reader036.fdocuments.us/reader036/viewer/2022070403/56649f325503460f94c4df84/html5/thumbnails/3.jpg)
Formation of the Continent
From: http://www.jamestown-ri.info/acadian.htm
Taconic orogeny
![Page 4: Bedrock and Glacial History and Geomorphology of Long Island and Southern Connecticut By Drew Martzolf.](https://reader036.fdocuments.us/reader036/viewer/2022070403/56649f325503460f94c4df84/html5/thumbnails/4.jpg)
Formation of the ContinentAcadian orogeny
From: http://www.lisrc.uconn.edu/lisrc/geology.asp?p2=History&p3=glhct
![Page 5: Bedrock and Glacial History and Geomorphology of Long Island and Southern Connecticut By Drew Martzolf.](https://reader036.fdocuments.us/reader036/viewer/2022070403/56649f325503460f94c4df84/html5/thumbnails/5.jpg)
Formation of the Continent
From: http://www.lisrc.uconn.edu/lisrc/geology.asp?p2=History&p3=glhct
Alleghenian orogeny
![Page 6: Bedrock and Glacial History and Geomorphology of Long Island and Southern Connecticut By Drew Martzolf.](https://reader036.fdocuments.us/reader036/viewer/2022070403/56649f325503460f94c4df84/html5/thumbnails/6.jpg)
Glacial History• Manetto stage
– Manetto gravel fluvially deposited
• Jameco stage– Jameco gravel deposited in northeast of island
• Manhasset stage– Montauk and Hempstead Formations deposited
• Wisconsinan stage– Ronkonkoma moraine
From: http://pubs.usgs.gov/fs/FS-008-99/html/CT_fig04.html
![Page 7: Bedrock and Glacial History and Geomorphology of Long Island and Southern Connecticut By Drew Martzolf.](https://reader036.fdocuments.us/reader036/viewer/2022070403/56649f325503460f94c4df84/html5/thumbnails/7.jpg)
Formation of Long Island Sound
Original postglacial basin was Glacial Lake Connecticut, dammed in by the moraines of Long Island; water drained to west. Rising sea levels allowed salt water to flood back into basin, followed by erosion to open access from the eastern end to the open ocean.