Ardara, facies D (Miocene of Italy)

Also known as Ardara-D

Where: Sardinia, Italy (40.6° N, 8.8° E: paleocoordinates 43.0° N, 3.7° E)

• coordinate stated in text

• small collection-level geographic resolution

When: Calcari di Mores Formation, Early/Lower Miocene (23.0 - 16.0 Ma)

• "The Ardara Section (Fig. 3A) consists of 9 m of Miocene sediments within the Calcari di Mores Formation."

• formation-level stratigraphic resolution

Environment/lithology: shoreface; conglomeratic sandstone

• "shallow-water, high-energy, shoreface environment"
• "Facies Ardara-D is composed of an 80-cm-thick, very coarse, poorly sorted, massive sandstone with carbonate cement. Sedimentary grains range in size from 1 to 4 mm, are subrounded to subangular, and consist of 90% quartz and 10% feldspar. The sandstone contains floating granitic and quartz pebbles with a maximum size of 5 cm. Fossils are represented by irregular echinoids belonging to genera Amphiope and Clypeaster, pectinid bivalves, and reworked barnacles (Fig. 4B, C). When underlain by Facies Ardara-C, contact is sharp. "When overlain by Facies Ardara-E, contact is gradual."

Size classes: macrofossils, mesofossils

Collection methods: bulk,

Primary reference: A. Mancosu and J. H. Nebelsick. 2015. The origin and paleoecology of clypeasteroid assemblages from different shelf settings of the Miocene of Sardinia, Italy. Palaios 30(5):373-387 [P. Novack-Gottshall/P. Novack-Gottshall]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 187330: authorized by Phil Novack-Gottshall, entered by Phil Novack-Gottshall on 21.07.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

• Only burrowing echinoids (mostly clypeasteroids) described.
 Ostreiformii -
Pectinida indet. Gray 1854 scallop
 Clypeasteroida - Astriclypeidae
Amphiope sp. Agassiz 1840 sand dollar
 Clypeasteroida - Clypeasteridae
Clypeaster sp. Lamarck 1801 sand dollar