Aramda Reef Mbr, Chaya Fm (Holocene of India)

Where: India (22.0° N, 70.5° E: paleocoordinates 22.0° N, 70.5° E)

• coordinate stated in text

• local area-level geographic resolution

When: Aramda Reef Member (Chaya Formation), Holocene (0.0 - 0.0 Ma)

• STRATIGRAPHIC RELATIONS: From Aramda Reef Member of Chaya Fm, which conformably overlies the Okha Shell Limestone Mbr of the Chaya Fm (Late Pleistocene) and is conformably overlain by the Porbandar Calcarenite Mbr of the Chaya Fm (Late Holocene). AGE: Chaya Fm is Late Pleistocene-Late Holocene, and with the Aramda Reef Mbr being the middle unit of the formation it is assigned here to a Holocene age. Age assignment based on combination of C and U/Th dates (numerous authors cited). STRATIGRAPHIC POSITION: From several beds throughout the Aramda Reef Mbr, which is the middle unit of the formation.

• member-level stratigraphic resolution

Environment/lithology: lagoonal or restricted shallow subtidal; poorly lithified, shelly/skeletal reef rocks

• ENVIRONMENT: Lagoonal setting.
• SPECIFIC LITHOLOGY: Coral-algal reef, coral bafflestone and algal rudstone with micro- and mega-fossils. LITHIFICATION: Poorly lithified on the basis of figured specimens and discussion in text.

Size class: macrofossils

Collected by Pandey, Bahadur, Mathur

Collection methods: surface (in situ),

• COLLECTORs: Unknown, probably Pandey, Bahadur, and Mathur. REPOSITORY: Department of Geology, University of Rajasthan, India.

Primary reference: D. K. Pandey, T. Bahadur, and U. B. Mathur. 2007. Stratigraphic distribution and depositional environment of the Chaya Formation along the northwestern coast of Saurashtra Peninsula, western India. Journal of the Geological Society of India 69:1215-1230 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 76319: authorized by Austin Hendy, entered by Austin Hendy on 18.11.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• COMPLETENESS: Not exhaustive but comprises all common forms of several megafossil groups, including corals, bivalves, gastropods, trace fossils, and algae. NOMENCLATURE: Fairly modern nomenclature, but often at family or only genus level.
unclassified
  -
Florideophyceae
 Corallinales - Corallinophycidae
? Lithophyllum sp. Philippi 1837
Archaeolithothamnium sp. Rothpletz 1891
 Hapalidiales - Corallinophycidae
"Lithothamnium sp." = Lithothamnion
"Lithothamnium sp." = Lithothamnion Heydrich 1897
Tubothalamea
 Miliolida - Hauerinidae
Quinqueloculina sp. d'Orbigny 1826
Foraminifera
 Rotalioidea - Elphidiidae
Elphidium sp. Monfort 1808
Globothalamea
 Rotaliida - Nonionidae
Nonionella sp. Cushman 1926
Foraminifera
 Biokovinacea - Charentiidae
Peneroplis sp. Montfort 1808
Anthozoa
 Scleractinia - Faviidae
Favia sp. Oken 1815 stony coral
 Scleractinia - Merulinidae
Goniastrea sp. Milne-Edwards and Haime 1848 stony coral
Favites sp. Link 1807 stony coral
 Scleractinia - Poritidae
Porites sp. Link 1807 stony coral
 Scleractinia - Acroporidae
Acropora sp. Oken 1815 stony coral
Ostracoda
 Platycopida - Cytherellidae
Cytherelloidea sp. Alexander 1929 ostracod
 Podocopida - Cytheridae
Paijenborchella sp. Kingma 1948 ostracod
 Podocopida - Loxoconchidae
Cytheromorpha sp. Hirschmann 1909 ostracod
Loxoconcha sp. Sars 1866 ostracod
 Podocopida - Cytheruridae
 Podocopida - Pectocytheridae
Pectocythere sp. Hanai 1957 ostracod
 Podocopida - Schizocytheridae
Neomonoceratina sp. Kingma 1948 ostracod
 Podocopida - Hemicytheridae
Caudites sp. Coryell and Fields 1937 ostracod
 Podocopida - Leptocytheridae
Callistocythere sp. Ruggieri 1953 ostracod
 Podocopida -
Pistocythereis sp. Gou 1983 ostracod
 Podocopida - Bairdiidae
Neonesidea sp. Maddocks 1962 ostracod
 Podocopida -
Loxocorniculum sp. Benson and Coleman 1963 ostracod
Radimella sp. Pokorny 1969 ostracod
Malacostraca
 Decapoda -
Decapoda indet. Latreille 1802 decapod
Bivalvia
 Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758 oyster
MISSPELLING: Ostraea
 Pectinida - Placunidae
Placunidae indet. Gray 1842 scallop
 Lucinida - Lucinidae
Lucinidae indet. Fleming 1828 clam
Gastropoda
 Sorbeoconcha - Cypraeidae
Cypraea sp. Linnaeus 1758 cowry
 Sorbeoconcha - Naticidae
Natica sp. Scopoli 1777 moon snail
 Cerithioidea - Cerithiidae
Cerithium sp. Bruguière 1789 cerith snail
 Trochoidea - Trochidae
Trochus sp. Linnaeus 1758 top snail
 Trochoidea - Turbinidae
Turbo sp. Linnaeus 1758 snail