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When metors hit the USA-The Carolina Bays

 
Anonymous Coward
User ID: 34441485
United States
02/15/2013 05:00 AM
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When metors hit the USA-The Carolina Bays
I have one (edit-two, no, three!) of these on my farm, and it sure looks like a meteor crater. Anybody else interested in this unique North and South Carolina feature? Want to consider what New York and New Jersey would look like after getting hit like this?





[link to www.pnas.org]

Evidence for an extraterrestrial impact 12,900 years ago that contributed to the megafaunal extinctions and the Younger Dryas cooling

[link to libres.uncg.edu]

Carolina bays are a unique geomorphologic entity located along the Atlantic coastal plain. Even without the benefit of an overhead view, they have been noted as a distinct feature of the coastal plain as first described by the South Carolina Geological Survey of South Carolina in 1848. The first aerial photographs in the 1930 coastal South Carolina region revealed that the unique depression wetlands were more than just a strange local phenomenon. Aerial photos enabled observers to see qualities in addition to their relative distribution that make them unique: their oval shape, northwest to southeast orientation and the presence of raised sand rims along their eastern and southeastern edges in many instances. Being such a distinctive surface feature and recognized for their ecological value, it would seem that Carolina bays would have been defined within their own map coverage across the Atlantic Coastal plain. However, just two statewide inventories have been completed for South Carolina and Georgia, and one for North Carolina has never been conducted.
Anonymous Coward
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02/17/2013 03:51 AM
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Re: When metors hit the USA-The Carolina Bays
Amazing LiDar Images of the Bays:

[link to cintos.org]

LiDAR Technology
The survey is enabled with LiDAR imagery. This relatively new technology allows the production of Digital Elevation Maps (DEMs) which have spectacular fidelity, often being able to discriminate elevation changes of only a few tens of centimeters, with spatial resolution measured in 2 to 3 square meter grids. For a great overview of the technology, you might start with this discussion about the Coastal Georgia Elevation Project .



It is well known that “Carolina bays” exist far north of the Carolinas. In Virginia, Maryland and New Jersey, they become more rounded, confounding the search for an obvious orientation. We see the bays forming a “bell” planform, with the narrow top pointing back along the orientation, and the wide base at the far end of the structure.

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