28.01.2014 Views

RESEARCH· ·1970·

RESEARCH· ·1970·

RESEARCH· ·1970·

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

GE~OLOGICAL SURVEY RESEARCH 1970<br />

TRIASSIC CONODONTS FROM ISRAEL<br />

By JOHN W. HUDDLE, Washington, D.C.<br />

Abstract.-A conodont fauna, dated as Carnian by ostracodes<br />

from the Sa'haronim }!"'ormation at Makhtesh Ramon in southern<br />

Israel contains species characteristic of the so-called Cretaceous<br />

conodont fauna of the Cameroons, Africa. Elements of the same<br />

fauna are found in upper Middle (or lower Upper?) Triassic<br />

rocl\:S in Sardinia, Spain, and Nevada. These occurrences suggest<br />

a third Middle Triassic conodont faunal province to the<br />

south of the Alpine province and central European Muschelkalk<br />

province. This conodont fauna suggests a late Ladinian rather<br />

than early Carnian Age for the lower part of the limestonegypsum<br />

member of the Sa'haronim Formation, but the Carnian<br />

Age as determined by ostracodes is tentatively accepted. Fish<br />

remains described by Cherchi in 1967 as conodonts and one<br />

holothuroid sclerite are illustrated.<br />

figure 2 of Sohn (1968). The coordinates given are<br />

those on the grid map of Israel. The stratigraphic<br />

position of the collections made by Nathan Schulman<br />

are shown in figure 1 of this paper.<br />

Rocks of<br />

Triassic conodonts from Israel were first reported<br />

by Sohn and Reiss (1964), but earlier, Eicher (1946)<br />

reported Triassic conodonts from a nearby locality in<br />

the Sinai Peninsula at approximately the same horizon.<br />

Eicher's report was greeted with skepticism by<br />

Branson and l\1ehl (Eicher, 1946, p. 616). Since then,<br />

large Triassic conodont faunas have been described in<br />

E\lrope, Asia, and North America, as a result of which<br />

Triassic conodonts are well enough known to be useful<br />

in correlation. The conodonts reported by Sohn and<br />

Reiss (1964) were collected by I. G. Sohn, supported<br />

by National Science Foundation grant G-24305, and<br />

by Nathan Schulman, of the Department of Geology<br />

of the Hebrew University of Jerusalem. The specimens<br />

were given to 1ne for study and description by I.<br />

G. Sohn, U.S. Geological Survey. Permission to publish<br />

was graciously granted by Prof. Y. 1{. Bentor<br />

when he was Director of the Geological Survey of<br />

Israel. Nathan Schulman provided the sections used<br />

in figure 1.<br />

COLLECTING LOCAliTIES<br />

The conodonts described here were collected in the<br />

eastern part of the Makhtesh Ramon in southern Israel.<br />

The localities are shown in figure 1 of Sohn<br />

( 1968), and the stratigraphic position of the collection<br />

from USGS l\1esozoic locality 29183A is shown in<br />

c:<br />

0<br />

:;;<br />

til<br />

E<br />

0<br />

u..<br />

E<br />

·c:<br />

e<br />

til<br />

.c<br />

.til<br />

B<br />

Limestone-<br />

marl ~ USGS Mesozoic loc. 29779<br />

member<br />

en<br />

Gevanim Formation<br />

0 100 200 METERS<br />

Limestone<br />

member<br />

~,USGS Mesozoic loc. 29778<br />

Limestone- 5 meters<br />

member<br />

USGS M .. o,ol< lo

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!