A late Triassic age for the Rochechouart impact structure, France

Details A late Triassic age for the Rochechouart impact structure, France A late Triassic age for the Rochechouart impact structure, France

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997m%26ps...32..629k&link_type=abstract

Meteoritics, vol. 32, pages 629-636

Mathematics

Logic

12

Scientific paper

40Ar/39Ar laser spot fusion dating of pseudotachylyte from the C25 km diameter Rochechouart impact structure of western-central France yields a matrix age of 214+8 Ma (2&). Field evidence indicates that the pseudotachylyte was generated during the modification stage of the impact process, probably during transient cavity collapse. This new age is considerably older than the previously accepted age of 186+8 Ma for this structure, which was obtained from hydrothermally- altered melt sheet samples. The new age is in accord with earlier paleomagnetic and fission track data, which indicated that Rochechouart was formed during the late Triassic. Moreover, the new determination is in agreement with the regional geological setting and field relations of the structure. The new age of 214+8 Ma falls within the Norian Stage of the Triassic System.

Affiliated with

Also associated with

No associations

Rating

A late Triassic age for the Rochechouart impact structure, France does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A late Triassic age for the Rochechouart impact structure, France, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A late Triassic age for the Rochechouart impact structure, France will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1227746