. Bulletins der amerikanischen Paläontologie. 375 venezolanische Foraminiferen: Caudri 25, dass der Übergang von einer Periode zur anderen und den Wert der verschiedenen Formen als Leitfossilien. Dr. Aguerrevere war so nett, uns in einem Brief, datiert die n-ten Februar 1941, einige Details über die lokale Stratigraphie, besonders der angibt, wie sich die Probe G. 91, war die erste Probe für die Untersuchung erhalten, verbunden mit der wich- tiger makrofauna an diesem Ort gefunden, da es keine funda-mentale Lithologischen oder paläontologischen Unterschied zwischen G.91 und den anderen Proben 7, wahrscheinlich applicab

• Bildanbieter: Book Worm / Alamy Stock Foto
• Bild-ID: RGA7R6
• Dateigröße: 7,2 MB (164,6 KB Komprimierter Download)
• Freigaben (Releases): Model - nein | Eigentum - nein
• Format: 3113 x 803 px | 26,4 x 6,8 cm | 10,4 x 2,7 inches | 300dpi

Weitere Informationen

Dieses Bild ist ein gemeinfreies Bild. Dies bedeutet, dass entweder das Urheberrecht dafür abgelaufen ist oder der Inhaber des Bildes auf sein Urheberrecht verzichtet hat. Alamy berechnet Ihnen eine Gebühr für den Zugriff auf die hochauflösende Kopie des Bildes.

Dieses Bild kann kleinere Mängel aufweisen, da es sich um ein historisches Bild oder ein Reportagebild handel

. Bulletins of American paleontology. 375 Venezuelan Foraminifera: Caudri 25 that mark the transition from one period to the other and of the value of various forms as index fossils. Dr. Aguerrevere was so kind as to give us in a letter, dated the nth February 1941, some details about the local stratigraphy, especially indicating how the sample G.91, which was the first sample received for investigation, is linked with the impor- tant macrofauna found at this locality as there is no funda- mental lithological or palaeontological difference between G.91 and the other samples7, probably applicable to the whole of our "pseudo-oolithic limestone". N Morro de la Puerto, metamorph G.gi.fcssiliferous marl. Section 1. The annotation on this section stated that no ammonites were found here but that in the macrofauna there occurred a gastropod that looked like Woodsalia and a large badly preserved ''Inoceramus" and also fragments of hinge lines reminding one of Inoceramus. Probably there is not much vertical displacement in the fault between the morro limestone and the marls at G.9I; the morro limestone was believed to be nothing but the reef facies of the same formation which includes the G.91 material and the sediments to the south as far as a certain distance south of the vil- lage of San Juan. The state of preservation of the "Inoceramus" from G. 91 is bad and the "ll^oodsalia" is, according to a tentative determin- ation by W. P. Woodring very similar to the lower Eocene or Paleocene, Turritella mortoni Conrad (comp. Kugler, 1938, p. 205), but if the identification should be correct, the occurrence of these two genera would indicate a Cretaceous age for G.91 and the "Woodsalia"-Ostrea beds. 7 Neither the sample G.91a nor G.91b contains any Discocyclina, s. str., but as the frequency of this genus varies greatly even in the other sam- ples where it is certainly present, there is no reason why this absence should be particularly

Stockbilder mithilfe von Tags suchen

• bookcentury1900