Paper Information

Journal:   GEOSCIENCES   Spring-Summer 2003 , Volume 11 , Number 47-48; Page(s) 48 To 67.
 
Paper: 

SEQUENCE STRATIGRAPHY OF THE SHALY AND TOP QUARTIZITE UNITS OF THE LALUN FORMATION IN TUYEH-DARVAR AREA (SOUTHWEST OF DAMGHAN)

 
 
Author(s):  LASEMI Y., AMIN RASOULI H.
 
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Abstract: 

The Shaly and Top Quartzite units of the Lalun Formation (Upper Lower Cambrian) have been studied in Tuyeh-Darvar area (48 kilometers southwest of Damghan) to determine their facies, sedimentary environments and sequence stratigraphy. These units are unconformably underlain by the sandstone unit of the Lalun Formation. They are unconformably overlain, with a paleosol horizon, by rocks of the Mila Formation.
The Shaly and Top Quartzite units consist of carbonate, siliciclastic (mainly marine) and storm facies groups. These were deposited in a storm dominated mixed clastic-carbonate ramp/estuary of the northwest passive margin of Gondwana, following the first late Early Cambrian mass extinction. Two sequences with both type 1 and type 2 sequence boundaries are recognized within the Shaly and Top Quartzite units.

 
Keyword(s): LALUN FORMATION, SEQUENCE STRATIGRAPHY, SHALY UNIT, TOP QUARTZITE UNIT, BIOHERM, ESTUARY, SOUTHWEST DAMGHAN, IRAN
 
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