Torrente Meduna sample 21 (Miocene of Italy)

Also known as Venus-Conus community sample 21

Where: Pordenone, Italy (46.2° N, 12.8° E: paleocoordinates 46.0° N, 12.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Montello conglomerate Formation, Tortonian (11.6 - 7.2 Ma)

• Miocene Torento-Meduna sequence unconformably overlies the Eocene Clauzetto Flysch (Flysch di Clauzetto) and is composed of Preplans Sandstone, Zouf marl, Rugo Mizza Sandstone, San Martino Calcarenite, Torrente Meduna Siltstone, Maraldi Sandstone, Bier Puddingstone, and Montello Conglomerate. The exposed thickness of the Montello Conglomerate has been estimated to reach several hundred metres.

• bed-level stratigraphic resolution

Environment/lithology: deltaic; unlithified, yellow conglomerate

• "In the absence of age-diagnostic microfaunas, the age was reported to be Tortonian grading into Messinian (Gelati, 1969; Massari et al., 1986). This assignment is consistent with the presence of marine megafossils in the lower part of the unit and of fresh-water molluscks in the upper levels"....."The Miocene sequence is truncated by and erosional surface and is overlain by Quaternary alluvial deposits of the Fiuli plain."
• Montello Conglomerate "consists of yellowish conglomerate, fine-grained loose sand and blue-grey clayey silt".

Size class: macrofossils

Collection methods: bulk,

• Based on single bulk samples, about 30 cubic centimetres each. Grain size data also provided.

Primary reference: M.P. Bernasconi and E. Robba. 1993. Molluscan palaeoecology and sedimentological features: an integrated appraoch from the Miocene Meduna section, northern Italy. Palaeogeography, Palaeoclimatology, Palaeoecology 100:267-290 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 37379: authorized by Austin Hendy, entered by Austin Hendy on 14.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• In enterers opinion the taxonomic list is representative of molluscan taxa, however no non-mollusca taxa are detailed.
 Pholadida - Pholadidae
 Cardiida - Erycinidae
 Cardiida - Montacutidae
Montacuta truncata Wood 1840 clam
 Cardiida - Ungulinidae
 Cardiida - Veneridae
Paphia taurelliptica, "Dosinia lupinus" = Dosinia lupina
"Dosinia lupinus" = Dosinia lupina Linnaeus 1758 venus clam
 Cardiida - Leptonidae
"Lepton transversarium" = Lepton (Lepton) transversarium
"Lepton transversarium" = Lepton (Lepton) transversarium Cossmann 1896 clam
 Thraciida - Thraciidae
"Thracia convexa" = Thracia (Thracia) convexa
"Thracia convexa" = Thracia (Thracia) convexa Wood 1815 clam
 Neogastropoda - Nassariidae
 Neogastropoda - Conidae
Conus berghausi cone shell
 Naticoidea - Naticidae
Neverita josephinia Risso 1826 moon snail