Memoirs of the Geological Survey of Pakistan, Volume 8The Survey, 1969 |
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Page 5
... primary ribs are rounded , dense and prominent on the sepatate portion becoming weak on the body chamber . They originate weakly on the upper margin of the umbilical wall near the umbilical shoulder and remain simple or bi- furcate from ...
... primary ribs are rounded , dense and prominent on the sepatate portion becoming weak on the body chamber . They originate weakly on the upper margin of the umbilical wall near the umbilical shoulder and remain simple or bi- furcate from ...
Page 7
... ribs are rectiradiate first , then become gently prorsiridiate on the whorl side . The primary ribs become thin towards the ventral margin and bifurcate on trifurcate from near the middle of whorl side . In addition one or two ribs ...
... ribs are rectiradiate first , then become gently prorsiridiate on the whorl side . The primary ribs become thin towards the ventral margin and bifurcate on trifurcate from near the middle of whorl side . In addition one or two ribs ...
Page 8
... ribs at comparative diameter . The Nakus example is readily distinguished from other Choffatia species figured by ... primary ribs are dense , gently to moderately prorsiradiate , bifurcating from the middle or slightly above , on the ...
... ribs at comparative diameter . The Nakus example is readily distinguished from other Choffatia species figured by ... primary ribs are dense , gently to moderately prorsiradiate , bifurcating from the middle or slightly above , on the ...
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Common terms and phrases
ammonite bed ammonite fauna ammonites from Wam argillaceous limestone bed Bajocian Baluchistan Bathonian Belemnite shale bifurcating body chamber Chiltan limestone Choffatia Choffatia Correlation Cutch described specimen diadematus Waagen Dimensions disconformably Dolikephalites Fatmi figured by Waagen Harnai holotype Hunting Survey indet involute Jurassic age Kheraiceras Bomburites limestone and shale Locality.-Wam Tangi Loralai Lower Callovian ammonite Lower Cretaceous Lower Jurassic Macrocephalites Indocephalites Macrocephalus Zone Massive limestone Mazar Drik formation Mazar Drik limestone Middle Jurassic outline of whorl Paralcidia are reported Paralcidia dubia Spath Parona perlamellosus Spath Plate Pleurocephalites polyphemus primary ribs prorsiradiate pyritic argillaceous limestone Quetta ribbing style Sarwan area sequence shell side view soorkaensis Spath species specimen from Nakus specimens internal mould Stratigraphic Range.-Lower Callovian style and side subgenus Survey of Pakistan synonymy Takatu limestone thickness Umbilical diameter thin bedded limestone Tithonian trifurcate umbilical wall umbilicus ventral view Vredenburg 1909 Wam Tangi whorl section whorl side Whorl thickness Umbilical