Tuesday, July 25, 2006

Sand Blow Charcoal

Carbon dating of the charcoal excavated with back hoe from a sand blow was 40,000 years BP. Gray material is from the water-perching gleyed horizon.

1811-1812 New Madrid Earthquakes
“In all the hard shocks mentioned, the earth was horribly torn to pieces - the surface of hundreds of acres, was, from time to time, covered over, in various depths, by the sand which issued from the fissures, which were made in great numbers all over this country, some of which closed up immediately after they had vomited forth their sand and water, which it must be remarked, was the matter generally thrown up. In some places, however, there was a substance somewhat resembling coal, or impure stone coal, thrown up with the sand. It is impossible to say what the depths of the fissures or irregular breaks were; we have reason to believe that some of them are very deep.”
-- Eliza Bryan, March 22, 1816
Lorenzo Dow's Journal, Published by Joshua Martin, Printed by John B. Wolff, 1849, on pages 344 - 346.p

Friday, June 30, 2006

Sand Blow

GPR image of a sand blow located in upper western Tennessee near the Mississippi River. Depth of the depression below surface is 7.5 ft. Depression is filled with coarse sand.

Friday, June 23, 2006

Grave GPR Image


Classic image of a modern grave showing hyperbolic reflection off man-made buried object. Grave was unmarked, which was approached broadside while traveling North-South across field. Note the surface compaction at either side of grave shaft near surface. The depth of grave is just below clay horizon, approx. 5 ft. By Christian tradition, the head of grave is at the western extent, such that on Resurrection Day (Easter Sunday) at sunrise, occupant will rise facing rising sun when hearing Gabriel blowing his horn. --GSSI 200-MHz Model 5106 Antenna