نتایج جستجو برای: ammonite
تعداد نتایج: 211 فیلتر نتایج به سال:
in order to study the stratigraphic of sedimentary deposits of the cenomanian in kopeh dagh, the taghiabad section was selected. in the eastern kopeh dagh, the upper part of aitamir formation has this time range characteristic. the upper part of this formation includes shale and glauconitic sandstones and contains variety of ammonite fauna. ten genera and species of ammonites are found inside t...
Volcaniclastic accumulations in shallow marine environments are prone to be eroded and transported by sedimentary agents then resedimented either on contemporaneous or younger substrates. Therefore, dating of the volcanic events through sediments containing interbedded layers can lead errors. A case study volcanism southeastern Iberian Range during Early Middle Jurassic is presented. Precise ho...
Approximately 40% of a skeleton including cranial and postcranial remains representing a new genus and species of basal neotheropod dinosaur is described. It was collected from fallen blocks from a sea cliff that exposes Late Triassic and Early Jurassic marine and quasi marine strata on the south Wales coast near the city of Cardiff. Matrix comparisons indicate that the specimen is from the lit...
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