Jan:
You may kindly furnish details of collecting locality and horizon. Initial assessment does not seem to give impression of these being from Deccan intertrappean beds.
Best
Syed
hello Jan,
yes I know this quarry and these enriched gastropod levels. Do you know if these gastropods are been found in the intertrappean layers or below the first flow ?
Cheers
Thierry
Hi Jan - to me they 'smell' early Cenozoic (Paleogene), but I am not familiar with faunas from that part of the world. Maybe Steffen Kiel and/or Andrzej Kaim could help?
Cheers, John
Jan:
Your material could possibly be derived from Infratrappean sediments of Latest Maastrichtian age of Gauripatnam Quarry of Rajahmundry area: Kindly see this link:
https://www.researchgate.net/publication/264082793_Naticid_drilling_predation_on_gastropod_assemblages_across_the_K-T_boundary_in_Rajahmundry_India_New_evidence_for_escalation_hypothesis
Best
Syed
Article Naticid drilling predation on gastropod assemblages across t...
Hi, the spiny specimen on the fourth image (IMG_4028) looks very "un-Cretaceous" to me. The one on the first two images (spire with smooth spiral, becoming spiny on the last whorl) reminds me of some snails described by Axel Olsson from the Maastrichtian of northern Peru. But the specimen on IMG_4028 really argues against a Cretaceous age.
Steffen
Steffen:
It seems that on account of much fresher look of the specimen depicted in image IMG-4028, it may have been collected from a different horizon than other specimens ( Jan to kindly clarify).
Mit freundlichem Gruss !
Syed
Hi Jan,
Image 3 is Turritella sp.
Image 4&5 - close to Thais sp.
Best regards
Deepak
Hi Jan and All, I am sorry that I am not able to respond to your query, but may I put forward into this discussion that myself also has a collection of ca. 35 species of marine (gastropods) and freshwater (mostly bivalves) fossils collected from Sangiran, which now is in the middle of Java island. Although most of them can be traced to Recent as some geological publications mentioned that Sangiran is dated Pleistocene, but I have Accidenticulabrum sangiranense and Cryptospira sangiranensis which are now extinct. So, my query is similar to yours. How can I date them without radiological analysis (which is very expensive). This attached specimen I determined as Conus sieboldii Reeve, or extant species C. socials Martin 1895 (scale bar 1cm); but a museum curator presumed it only as Conus sp.
Norma:
It is neither Conus sieboldii nor Conus socialis but something unique and for the time being could be designated as Conus sp.
Best
Syed
Thank you prof. Jafar. I have other species which is attached; C. villepini may not correct either as it is West Atlantic species. Could it spread to Java in the old days? Thanks.
Recently, Geological Survey of India, Palaeontology Division, Hyderabad showed me specimens from the same area for identification. They appear to belong to the Tertirary. I am working on it along with the geologist from the GSI.
Alexander:
Which sediments: Infratrappean or Intertrappean of Gauripatnam Quarry? Are you confident that these Gasteropods are of Early Danian age? If specimen/s also come from Infratrappean beds as stated by Jan, then it cannot be of Early Danian age. Kindly see Fig. 4C of this link:
https://geoweb.princeton.edu/research/keller/pubs/Keller_2014_GSA_Special_Papers.pdf
Best
Syed
Alexander:
Do you think that your latest answer adequately addresses the question originally posed by Jan?
Best
Syed
They are fossils that come from different layers. I think it is a resedimentation phenomenon.
The turritella (very similar to T. duplicata L. 1758) belong to early Pleistocene. The first at the top looks like a Cerithium? The other instead is a Vasidae or Muricidae, belong to Tertiary probably Danian like in Paris basin. I'll try to get you more precise information the next time. Roberto.
They are found only in few intertrappean locations mainly from the upper part.
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