6Nov2000h

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6 November 2000

Some sentences in present discussions are exciting ! In this moment, I remark this from the last Ch. Sandberg commentary

"Pa. semichatovae originated and lived much earlier in central Asia and then suddenly migrated worldwide with the eustatic rise in the Early rhenana Zone or its M.N. equivalent" --

'= Oh, yes! Early rhenana Z. is connected with the sea level rise (Fr-Geneseo-Archive, August) and thus would start the Fr3. The preceding sea level depressions were always connected to visible change in coral and other benthic faunas, including also benthic foraminifers (abrupt increase of abundance of Nanicella spp., followed by entry of Multiseptida corallina, etc.), reefs and carbonate platforms of this age are smaller and thinner than those of Fr1 and Fr2, having commonly grainstones > carbonate mudstones, faunulae show increased disparity, but diversity is great (especially in rimming reefs). The reef debris contains again trilobites (J. Oppenheimer found allegedly also Scutellum in these limestones of Early rhenana Z. at Brno), other arthropods, diversified alveolitids, crinoids, arthropods, abundant fish and shark remains ... also Atelodictyon, Labechia, Stromatoporella, Syringopora came in, with some parallel with the beginning times of the Middle-Upper Devonian reefs, i.e. during late Eifelian. Also in amphiporids, the fauna is much changed (Amph. moravica, or Novitella spp.). Solenoporaceae and red algae enter again in larger amounts, etc. - Greetings to all, stressing as complex view to specifics of the late Frasnian as possible --

as usually, Jindra.