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Tricarina
''Tricarina'' is a genus of decapod crustaceans, known from a single incomplete fossil specimen from the Cretaceous of western Iran. It has a flattened body with three longitudinal ridges, which give it its name. ==Source== The single known specimen of ''Tricarina'' was discovered in a well core that had been bored at a site on the Khuzestan Plain in south-western Iran, at , and at a depth of . The rocks that contain it are calcareous shales, which form part of the Gadvan Formation, and are part of the main sequence of rocks for the production oil and gas around the Persian Gulf. Examination of the foraminiferan fossils show that the shales are Barremian to Aptian in age.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Tricarina」の詳細全文を読む
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