Minihagalkanda [Jaffna Limestone] (Miocene of Sri Lanka)

Where: Sri Lanka (6.4° N, 81.6° E: paleocoordinates 6.4° N, 81.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Jaffna Limestone Formation, Burdigalian (20.4 - 16.0 Ma)

• STRATIGRAPHIC RELATIONS: From Jaffna Limestone, which unconformably overlies Precambrian basement, and is unconformably overlain by recent sand dunes and coral reefs, and Quaternary red earth. AGE: late Early Miocene (Burdigalian) on the basis of foraminifera. STRATIGRAPHIC POSITION: From unknown position within formation.

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, shelly/skeletal, white, yellow limestone

• ENVIRONMENT: Shallow marine, carbonate facies, probably adjacent to coral reef environments.
• SPECIFIC LITHOLOGY: Hard, partly crystalline, compact, indistinctly bedded creamy coloured rock. Massive in parts but some layers are richly fossiliferous. LITHIFICATION: Lithified, based on facies description.

Size class: macrofossils

Collection methods: COLLECTOR: Unknown collector. REPOSITORY: Unknown repository, possibly Geological Survey Department, Sri Lanka or the National Museum of Sri Lanka.

Primary reference: P. G. Cooray. 1984. An Introduction to the Geology of Sri Lanka (Ceylon) 1-340 [A. Hendy/A. Hendy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 77477: authorized by Austin Hendy, entered by Austin Hendy on 13.01.2008, edited by Wolfgang Kiessling

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropoda, bivalvia, foraminifera, and anthozoa. NOMENCLATURE: Not an authoritative publication, but with relatively modern nomenclature, and subgenus and species-resolution assignments.
unclassified
  -
Rotaliina
 Nummulitacea - Nummulitidae
Bivalvia
 Pectinida - Pectinoidae
Chlamys sp. Röding 1798 scallop
 Ostreida - Gryphaeidae
"Ostrea (Lopha) virleti" = Hyotissa virleti
"Ostrea (Lopha) virleti" = Hyotissa virleti Deshayes 1832 oyster
 Ostreida - Pinnidae
 Carditida - Carditidae
 Cardiida - Veneridae
"Antigona puerpera" = Periglypta puerpera Linnaeus 1758 venus clam
SUBSPECIES: Antigona puerpera granosa
 Cardiida - Cardiidae
Gastropoda
 Architaenioglossa - Ampullinidae
"Euspirocrommium oweni" = Pachycrommium oweni
"Euspirocrommium oweni" = Pachycrommium oweni d'Archiac and Haime 1854 snail
 Neogastropoda - Conidae
Conus (Lithoconus) litteratus Linnaeus 1758 cone shell
 Stromboidea - Strombidae
Strombus spinosus conch
SUBSPECIES: Strombus spinosus minihagali
 Cypraeoidea - Cypraeidae
"Cypraea (Lyncina) jenkinsi" = Luria (Basilitrona) jenkinsi d'Archiac and Haime 1853 cowry
 Trochoidea - Trochidae
Tectus loryi d'Archaic and Haime 1853 top snail
Gymnolaemata
 Cheilostomata -
Anthozoa
 Scleractinia - Poritidae
Porites sp. Link 1807 stony coral
 Scleractinia - Merulinidae
"Hydnophora plana" = Hydnophora rudis
"Hydnophora plana" = Hydnophora rudis Duncan 1864 stony coral
 Scleractinia - Montlivaltiidae
"Montlivaltia" brevis Duncan 1864 stony coral
 Scleractinia - Faviidae
Solenastrea sp. Milne-Edwards and Haime 1848 stony coral
 Scleractinia - Flabellidae
Flabellum sp. Lesson 1831 stony coral
Foraminferea
 Miliolida - Soritidae