الفهرس | Only 14 pages are availabe for public view |
Abstract The carbonate facies of the Tarwan Calk and the thebes formation are characterized in the studied area by the following features: 1- They have a consistent facies. 2- The thebes formation is represented by marly faces (at the base), rhythmic chalky facies and noduler and shelly limestone faces. 3-petrographically, the carbonate facies is composed mainly of bioclastic wackstone and lime mudstone 4-planktonic ooze in laminated carbonate beds have been encountered throughout the lower part of the Thebes formation. 5-The chalk beds frequently form thin hard massive beds alternating with semi friable, laminated ones. 6-except for lamination, no other primary depositional structures such as ripple marks, cross-beddinggg and graded bedding have been recorded. 7-General paucity of trace elements; only sr content is relatively high. |