The Pangaean Megamonsoon: Evidence from the Upper Triassic Chinle Formation, Colorado Plateau
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Algae (Dasycladales) from the Upper Triassic Nayband Formation (northeast Iran)
Dasycladales are relatively abundant in the bedded limestones of the Bidestan and Howz-e Khan members of the Late Triassic Nayband Formation in central Iran. In a locality south of the town of Naybandan (northwest of Dig-e Rostam), several Rhaetian dasycladacean algae were found in thin sections. The following taxa are described: Diplopora phanerospora Pia, Naybandoporella rhaetica nov. gen. no...
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Two teeth collected from the Upper Triasssic Chinle Formation of northeastern Arizona are described here and named Kraterokheirodon colberti gen. et sp. nov. These teeth are novel in having an occlusal ridge with six cusps and a posterior shelf lacking dentine. Evidence for thecodont implantation of the root suggests amniote affinities for these teeth. They do not match any teeth known for basa...
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Paleomagnetic poles and magnetostratigraphy were obtained from the late Carnian and early Norian Petrified Forest Formation, The remanent magnetization characteristics of this variegated claystones formation are correlated closely with stratal color; red strata display univectorial magnetizations directed to the origin of orthogonal axes plots between 300' and 630°C whereas progressively great...
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متن کاملDegraded Wood in the Upper Triassic Petrified Forest Formation (chinle Group), Northern Arizona: Differentiating Fungal Rot from Arthropod Boring
Permineralized wood from the middle of the Upper Triassic Petrified Forest Formation in Arizona, in strata correlative with the Sonsela Member, displays various forms of heartwood degradation. Pitting of the wood exhibits two primary morphologies. Elongated cavities are up to several mm long, parallel to the wood grain and may merge to form channels that extend longitudinally through the wood f...
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ژورنال
عنوان ژورنال: PALAIOS
سال: 1991
ISSN: 0883-1351
DOI: 10.2307/3514963