Upper Paleozoic biostromes in island-arc carbonates of the eastern Klamath terrane, California.

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The eastern Klamath terrane (eKt) of California, a geographically isolated, island-arc area, was invaded by biostromal communities during three intervals of carbonate deposition in the Carboniferous and Permian. Visean/Serpukhovian biostromes were formed on short-lived carbonate banks by the Tethyan brachiopod Striatifera and phylloid algae. Bashkirian biostromes on similar banks were formed by the cosmopolitan microproblematica Tubiphytes and Donezella. Wolfcampian biostromes occur in a thick carbonate platform and slope section and were formed by Tubiphytes, the phylloid alga Eugonophyllum, and Palaeoaplysina, an enigmatic taxon known mainly from Laurentia. Species diversity of biostrome dwellers increased from the Early Carboniferous to Early Permian, when it reached the level of high-diversity shelf-mud communities. Biostromes in the eKt record the global recovery of Carboniferous-Permian reef biotas during temporal intervals of quiescent volcanism that permitted carbonate deposition.
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