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Bump ya back.

Clarify for me, please. Am I correct in concluding the Rio Cuarto impact was off of South America? And the later impact (1150 BC) was the more familiar Yucatan strike?

And is there a discernible fit with the underwater city off the western tip of Cuba?

POSSIBLE CHAIN OF METEORITE SCARS IN ARGENTINA

A string of linear depressions characterizes the Rio Cuarto crater field

In the January 16, 1992, issue of Nature, P.H. Schultz and R.E. Lianza describe a curious chain of grooves incised in the Argentine pampas near Rio Cuarto.

"During routine flights two years ago ..., one of us (R.E.L.) noticed an anomalous alignment of oblong rimmed depressions (4 km x 1 km) on the otherwise featureless farmland of the Pampas of Argentina. We argue here, from sample analysis and by analogy with laboratory experiments, that these structures resulted from lowangle impact and ricochet of a chondritic body originally 150-300 m in diameter."

There are ten gouges in all, strung out along 50 kilometers. The scars are young, perhaps only a few thousand years old, well within the time of human habitation. Schultz and Lianza also found pieces of meteoritic rock and glassy fragments of impact melt.

(Schultz, Peter H., and Lianza, Ruben E.; "Recent Grazing Impacts on the Earth Recorded in the Rio Cuarto Crater Field, Argentina," Nature, 355:234, 1992. Also: Monastersky, R.; "Meteorite Hopscotched across Argentina," Science News, 141:55, 1992.)

Comments. Note the similarities to the much more numerous Carolina Bays. See ETB1 in our catalog: Carolina Bays, Mima Mounds, Submarine Canyons.

"And the later impact (1150 BC) was the more familiar Yucatan strike?"

The Yuchatan Strike was named Chixlub(sp) and was 65 millions years ago. The dino killer, it was.

"And is there a discernible fit with the underwater city off the western tip of Cuba?"

Glad you asked. I found this while looking for support for my theory about the underwater Cuban city. It occurred to me that 2200 feet is a lot of subsidence, so I have proposed that the Gulf Of Mexico was blocked off (like the Black Sea) during the last Ice Age and dried up to some stable level and these people actually built this city/structures on the coast of the lowered Gulf of Mexico.
I was looking at some underwater data and saw some curious round depressions just south of the Bahamas and went looking for impacts that may have broken the 'dam' to the Gulf of Mexico. I came across this article in my search, which lends some support to impacts in the region.