Diagram of Shiva impact area.
Credit: Sankar Chatterjee
"Check the Fall Line, large enough to kill all life."
Actually, neither of these statements is accurate. The book "Chesapeake Invader" by C. Wylie Poag, 1999 gives all the details. The 50 mi. diameter crater lies wholely in Virginia. The south end is Norfolk, and the north end is at Exmore, on the Va. end of the Delmarva Peninsula. I have driven down there trying to find it, but haven't yet. The western side is along the west side of the Chesapeake Bay and the jogs in the York and James Rivers indicate its edge.
Nineteen miles diameter is hardly large enough to wipe out all life, although it would certainly mess up your year. The Chesapeake Meteor (50 mi. diameter), a 9md crater off Tom's River, NJ, and another 50md crater in Siberia named Popigai all crashed around 35 million years ago. Although there seem to have been other major impact events, and this is around the end of the Eocene and beginning of the Oligocene, scientist have found no evidence of a major world wide die off tied to these meteors. The dinasaur meteor off Yucatan was about 120 miles in diameter. Scientists are now looking at the Shiva Crater off India which is also about 65 million years old. This crater is 400 x 600 kilometers, and combined with the Yucatan meteor was probably responsible for a 65 to 70% die off.
For more info. Google Meteorite Impact Craters on Earth.
Diagram of Shiva impact area.
Credit: Sankar Chatterjee
In some places the ripples are quite large ~ for example, I live just about in the center of one of the "chunks". The "top" edge, which is to the outside of the ripple area, is about 2 miles West of me. The "bottom" edge, which is closer to the crater proper, is about 4 miles East of me. It is perceptibly LOWER than the "top".
In early times folks panned gold on the "top" edge.
Unfortunately this are is not as dramatic as Bohemia where the impact left a surrounding ring of very high hills, or short mountains. Still, where the subsurface areas were revealed to the surface as the layers of rock were turned on end, the areas were mined for gold, silver and other important metals.
The "dollar" is named after the "thaler" which is named after the site/mine in Bohemia where silver was found in abundance in ancient times. I've always thought it more than coincidental that George Washington was rumored to have "tossed a dollar" across the Potomac right there in the vicinity of the Fall Line (which is where the most pronounced "edge" to the ripple area is found. If you were going to mine silver in Virginia, that would be the place.