You are here:

Geology/depositional environment

Advertisement


Question
sir what are the environment of depostion of tobra formation ?i am little confused with literature .please help

Answer
Dear Muhammad Musa,

The age of Tobra Formation is Early Permian overlying unconformably on Early Cambrian and found in Punjab Platform and Potwar basin area in outcrops and wells. Based on the lithological studies of the rocks of Tobra is comprised of boulder beds, sandstone, clay, marl, and fossiliferous limestone. The basal unit is composed of tillite with polished and striated pebbles,providing evidence of Late Carboniferous-Early Permian glaciation whereas the rocks units above Tobra is of marine origin with rich fauna which include bivalves, foraminifera, brachiopods and ammonoids.

Therefore, it is generally believed that due to glaciation effect in the southern plate of Gondwanaland Tobra or Talchir beds have deposited. Tobra or Talchir beds is widely exposed and present in India, Pakistan, Arabian Peninsula, South Africa, Australia and South America. Almost all the southern continents which were part of the single plate Gondwanaland before its breakup.

Hope this may help.

Rating would be appreciated.

Geology

All Answers


Answers by Expert:


Ask Experts

Volunteer


Syed Tariq Hasany

Expertise

MY HUMBLE REQUEST. BEFORE SENDING A QUESTION PLEASE READ THE FOLLOWING CAREFULY. ANSWERING ONLY PUBLIC QUESTIONS. Ask questions of exploration of Petroleum, and specific regions for specific answers about Pakistan, Central Asia, Middle East and Far East. Ask questions of Business side of the petroleum Geology. Love to guide students and also Career related issues PRIVATE QUESTIONS on thasany@yahoo.com I am not expert of Hard rocks (Igneous and metamorphic rocks)Volcanic activity and related petrology, mineralogy and its exploration. BE SPECIFOC WHAT YOU WANT TO KNOW AND ASK WITH DIGNITY AND RESPECT. Show me your determination and commitment to learn. PLEASE TRY TO WRITE RIGHT, PROPER AND CORRECT LANGUAGE. DO NOT USE TEXT(SMS)STYLE. Thanks TARIQ

Experience

Petroleum Exploration

Organizations
Petronas Carigali Sdn Bhd

Publications
In Pakistani and Asian Petroleum Confertence special Publications

Education/Credentials
BSc Honours in Geology and Master of Science degree in Petroleum Geology

Awards and Honors
Active member AAPG, SPE and PAPG Treasurer PAPG and AAPG Visiting Geoscientist

©2016 About.com. All rights reserved.