Mathematics – Logic
Scientific paper
Nov 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979e%26psl..45..349h&link_type=abstract
Earth and Planetary Science Letters, Volume 45, Issue 2, p. 349-354.
Mathematics
Logic
1
Scientific paper
Geologic relationships in the central Pyrenees of southern France demonstrate that lherzolite has been emplaced, as a plastic solid, into middle or upper Cretaceous calcareous rocks; that it has been eroded and clastic peridotite debris deposited in rocks of approximately the same age as those it intruded; and that it has also been juxtaposed against Cretaceous limestone or marble along or within the North Pyrenean fault zone. There are at least three types of late Cretaceous lherzolite breccias known from this region. Metamorphism of the country rock and penetrative deformation of the lherzolite and marble took place during shearing. Shearing was accompanied by an important period of motion (perhaps 85-100 m.y. ago) along the North Pyrenean fault and an associated thermal event which involved temperatures of 400 +/- 100°C. Cretaceous metamorphism along the North Pyrenean fault zone was not due to forcible primary hot intrusion of lherzolite.
Bennett Vickie C.
Hall Clarence A.
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