North American strewn field - Impact Deposit

Alternate Names Bediasites, georgianites
Coordinates 26° 7' 12" N; 75° 13' 48" W
Notes
  1. Bediasites and georgianites refer to tektites found in Texas and Georgia, respectively (Glass, 1990). Microtektites in this strewn field have been found in deep sea sediments (Glass and Wu, 1993)
Country United States of America

Related Countries :
  1. United States of America
Region Texas
Date Confirmed 1996
Notes
  1. Impact origin confirmed by Koeberl et al., 1996
Age (Ma) ~35.4
Notes :
  1. Glass et al., 1986; Koeberl et al., 1996

Method :
  1. 40Ar/39Ar
Impactor Type Unknown

Advanced Data Fields

Notes

Local Language
N/A
Spherules
Unknown
Tektites
Unknown
Indivudual Glass Clasts
Unknown
Source Crater
Chesapeake Bay
Geology
Deposited in upper Eocene sediments
  1. Glass, 1990
Other Shock Metamorphism
Shock mosaicism in quartz
  1. Koeberl et al., 1996
Shatter Cones
No
Planar Fractures
No
Planar Deformation Features
No
Diaplectic Glass
Yes
Coesite
No
  1. Glass and Wu, 1993
Stisovite
No
  1. Glass and Wu, 1993

References

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B P Glass, C M Hall, D York (1986) 40Ar/39Ar laser-probe dating of North American tektite fragments from Barbados and the age of the Eocene-Oligocene boundary, Chemical Geology: Isotope Geoscience Section 59, p. 181-186, Elsevier, doi:10.1016/0168-9622(86)90070-9

B P Glass (1990) Tektites and microtektites: Key facts and inferences, Tectonophysics 171, p. 393-404, url

B P Glass, J Wu (1993) Coesite and shocked quartz discovered in the Australasian and North American microtektite layers, Geology 21, p. 435-438, url

C Koeberl, C W Poag, W U Reimold, D Brandt (1996) Impact origin of the Chesapeake Bay structure and the source of the North American tektites, Science 271(5253), p. 1263-1266, url