Maniyara Fort, Bermoti Member (Oligocene of India)

Where: India (23.5° N, 68.6° E: paleocoordinates 15.6° N, 66.7° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Bermoti Member (Maniyara Fort Formation), Chattian (28.1 - 23.0 Ma)

• From a 40 cm-thick bed. The presence of Nummulites fichteli, N. aff. vascus, N. sublaevigatus and Eulepidina dilatata indicates an early Chattian age (SBZ22b of Cahuzac and Poignant, 1997) for the lower part of the Coral Limestone Member, while the absence of Nummulites and the presence of E. dilatata suggest a late Chattian age (SBZ23 of Cahuzac and Poignant, 1997) for the upper part of the Bermoti Member.

• bed-level stratigraphic resolution

Environment/lithology: lagoonal or restricted shallow subtidal; dolomitic, shelly/skeletal, sandy rudstone

• For the Maniyara Fort Formation a mainly shallow restricted inner ramp environment is indicated by the occurrence of in situ Kuphus tubes (Reuter et al., 2008) an individual rich, monotypic (Bairdia) ostracod assemblage in the micrite-rich facies (Kornicker, 1961) and common dolomitization. Top of the bed has a ferruginous crust, interpreted as emergence during Ch3 sequence boundary of Hardenbol et al. (1998), implying a very shallow environment for this 40 cm-thick bed.
• 40 cm-thick, dolomitic sandy (ferriclast sand) rudstone with gastropods

Size class: macrofossils

Collected by Harzhauser et al in 2008; reposited in the NHMW

Collection methods: surface (float), surface (in situ),

• COLLECTORS: M. Harzhauser and colleagues, c. 2007-2008. REPOSITORY: NHMW, Vienna.

Primary reference: M. Reuter, W. E. Piller, M. Harzhauser and A. Kroh. 2013. Cyclone trends constrain monsoon variability during late Oligocene sea level highstands (Kachchh Basin, NW India). Climate of the Past (9)2101-2115 [W. Kiessling/M. Krause]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 152420: authorized by Wolfgang Kiessling, entered by Mihaela Krause on 21.11.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropods; few bivalves mentioned. NOMENCLATURE: Authoritative publication with modern nomenclature, and species-resolution identifications.
unclassified
  -
Malacostraca
 Decapoda - Carpiliidae
Palaeocarpilius rugifer Stoliczka 1871 crab
 Decapoda - Portunidae
Neptunus wynneanus swimming crab
Cephalopoda
 Nautilida - Nautilidae
Nautilidae indet. de Blainville 1825 nautiloid
Gastropoda
 Cerithioidea - Cerithiidae
"Campanile pseudoobeliscus" = Cerithium pseudoobeliscus, Cerithium bermotiense
"Campanile pseudoobeliscus" = Cerithium pseudoobeliscus Grateloup 1832 cerith snail
Cerithium bermotiense Harzhauser et al. 2009 cerith snail
 Architaenioglossa - Ampullinidae
Ampullinopsis crassatina Lamarck 1804 snail
 Sorbeoconcha - Strombidae
Dilatilabrum sublatissimum d'Orbigny 1852 true conch
Persististrombus radix Brongniart 1823 true conch
 Neogastropoda - Volutidae
Lyria (Indolyria) maniyaraensis Harzhauser et al. 2009 volute
Bivalvia
 Pectinida - Pectinoidae
Aequipecten sp. Fischer 1886 scallop
Echinoidea
 Clypeasteroida - Clypeasteridae
Clypeaster sowerbyi sand dollar
abundant specimens
 Spatangoida - Brissidae
Eupatagus singhi heart urchin
rare specimens
 Cidaroida - Cidaridae
Prionocidaris sp. Agassiz 1863 pencil urchin
common specimens
Anthozoa
 Hexacorallia -
Scleractinia indet. Bourne 1900 stony coral
Foraminifera
 Nummulitacea - Nummulitidae
Nummulites sp. Lamarck 1801