Tetti Borelli (Roest collection) (Miocene of Italy)

Where: Italy (45.1° N, 7.9° E: paleocoordinates 44.8° N, 7.7° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Montaldo Member (Sant'Agata Fossili Formation), Tortonian (11.6 - 7.2 Ma)

• Later based on the abundant and well-preserved foraminifers (d’Onofrio et al. 1975), and on the basis of pteropods (Pavia & Robba 1979) the age of the sediments was referred as Early Messinian. However, a more recent revision of the pteropod fauna of Tetti Borelli indicates again a Tortonian age (Janssen 2012). In his monograph, Janssen (2012) also refers to renewed foraminifera analysis which confirms the Tortonian age. Ben Roest has collected fossils several times at an outcrop just outside of the classic Tetti Borelli locality, which was totally overgrown. In this 'new' outcrop the layers were sloping from down-left to up-right. There was a distinctive thin clay layer with hardly any fossils in it. This clay layer has served as reference for the samples taken. Material with no stratigraphic info.

• group of beds-level stratigraphic resolution

Environment/lithology: deep-water; poorly lithified sandstone

• Deep-water marine sediments. On the basis of the taxonomic composition refer to deeper water environment around 300–400 m depth. This estimation is in correspondence with the geological background (flexoturbiditic origin of the sediments, see Pavia & Robba 1979). On the basis of the molluscan assemblages, Sturani (1978) also suggested bathyal environment (200–500 meter) for pre-evaporitic sediments. Similar depth estimation was acquired by evaluation of otoliths (Girone et al. 2010).
• Poorly lithified based on sampling (sieving and ultrasonic cleaning) and fossil preservation. Serpentinite sand.

Size classes: macrofossils, mesofossils

Collected by B. Roest in 1994

Collection methods: sieve

• Repository: Naturalis Biodiversity Center, Leiden

Primary reference: A. Dulai. 2019. New data on the Late Miocene brachiopod fauna of Tetti Borelli (Piedmont, N Italy). Rivista Italiana di Paleontologia e Stratigrafia 125:125-145 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 199891: authorized by Matthew Clapham, entered by Matthew Clapham on 18.02.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

Brachiopoda
  -
Brachiopoda indet. Cuvier 1805
Rhynchonellata
 Rhynchonellida - Cryptoporidae
Cryptopora lovisati Dreger 1911
 Terebratulida - Megathyrididae
Joania aff. falunica de Morgan 1915
Joania cordata Risso 1826
 Terebratulida - Kraussinidae
Megerlia truncata Linnaeus 1767
Lingulata
 Lingulida - Lingulidae
? Lingula sp. Bruguiére 1797