Memoirs of the Geological Survey of Pakistan, Volumes 7-8The Survey, 1969 |
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Page 4
... sequence . Only in the extreme north of the zone , in the Pishin town area , poorly studied antimony ore deposits are known . These occur in the Oligocene sandstone - shale sequences and are confined to major and extended zones of ...
... sequence . Only in the extreme north of the zone , in the Pishin town area , poorly studied antimony ore deposits are known . These occur in the Oligocene sandstone - shale sequences and are confined to major and extended zones of ...
Page
NON SEQUENCE B. Mazar Drik formation ( ii ) Highly pyritic siltstone 2-3 feet ( i ) Grey , brownish grey pyritic argillaceous limestone , fossiliferous ( Lower Callovian ammonites , bivalves , Belemnopsis sp . ) with a 6 " to very thin ...
NON SEQUENCE B. Mazar Drik formation ( ii ) Highly pyritic siltstone 2-3 feet ( i ) Grey , brownish grey pyritic argillaceous limestone , fossiliferous ( Lower Callovian ammonites , bivalves , Belemnopsis sp . ) with a 6 " to very thin ...
Page 10
... sequence representing likely the time span extending from Middle Callovian to early Upper Jurassic (Pre Tithonian '2) . AGE AND CORRELATION The ammonites identified from the argillaceous pyritic limestone (unit 5 B (i)) of the above ...
... sequence representing likely the time span extending from Middle Callovian to early Upper Jurassic (Pre Tithonian '2) . AGE AND CORRELATION The ammonites identified from the argillaceous pyritic limestone (unit 5 B (i)) of the above ...
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ammonite ammonite bed antimony argillaceous limestone bed Bajocian Baluchistan Baluchistan geosynclinal development barite Bathonian Belemnite bifurcating body chamber central geosynclinal trough Chagai median massif Chiltan limestone Choffatia chromite chromite deposits Cutch described specimen diadematus Waagen disconformably Dolikephalites endogenous deposits endogenous mineralization Fatmi felsic fluorite fluorite deposits fractured genus geosynclinal holotype Homoeoplanulites indet Indian Platform Indocephalites Locality.-Wam Tangi Lower Callovian Lower Callovian ammonite Macrocephalites magmatism magnetite Massive limestone Mazar Drik formation Mazar Drik limestone metallogeny microconch molybdenum Noetling Oligocene Paleogene Paralcidia Pishin Pleurocephalites polyphemus primary ribs pyritic pyritic argillaceous limestone regularities of distribution ribbing style rocks Sembar formation sequence shale shell side view skarn southern Spath specimens internal mould Stratigraphic Range.-Lower Callovian subgenus Survey of Pakistan Takatu limestone thin bedded limestone Tithonian trifurcate ultramafic intrusions Umbilical diameter umbilical wall umbilicus Upper venter volcanogenous Vredenburg 1909 Wam Tangi West Pakistan Whorl height whorl section whorl side Whorl thickness