THE FIRST UPPER TRIASSIC SILICIFIED HYPERCALCIFIED SPONGES FROM THE ALEXANDER TERRANE, GRAVINA ISLAND AND KEKU STRAIT, SOUTHEAST ALASKA From: Journal of Paleontology | Date: March 1, 2008| Author: Caruthers, Andrew H; Stanley, George D Jr; Senowbari-Daryan, Baba | Copyright Paleontological Society Mar 2008. Provided by ProQuest LLC.Copyright information

ABSTRACT-

This paper describes the first silicified Upper Triassic (Early Norian) hypercalcified sponges known from the Alexander terrane, southeast Alaska. Sponges consist of five taxa from the Cornwallis Limestone of Keku Strait, southeast Alaska: Amblysiphonella Steinmann, Parauvanella Senowbari-Daryan and Di Stefano, Nevadathalamia cylindrica (Seilacher), N. minima n. sp., and Stellispongia (S. cf. subsphaerica Dieci, Antonacci, and Zardini). The hypercalcified sponges of the Alexa...

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