Nyalindung Fm - cycle 9, bed 2b (Miocene of Indonesia)

Where: Indonesia (7.0° S, 106.6° E: paleocoordinates 9.1° S, 114.2° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Nyalindung Formation, Middle Miocene (16.0 - 11.6 Ma)

• STRATIGRAPHIC RELATIONS: Formerly referred to as Nyalindung Mbr of Cimandiri Fm (Sukamoto, 1990). Overlying Jampang Fm. THICKNESS: From ~2 m thick bed within <8 m section; total composite section thickness is estimated at around 40 m. AGE: Age still debated, but most evidence, including molluscan and foraminiferal biostratigraphy suggest a Middle Miocene age. STRATIGRAPHIC POSITION: From lower cycle 9 near base of the Nyalindung Fm.

• bed-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, fine-grained, silty sandstone

• SEQUENCE STRATIGRAPHY: From upper part of transgressive systems tract.
• SPECIFIC LITHOLOGY: Muddy fine sandstone. LITHIFICATION: Poorly lithified, based on figured specimens (some from unlithified sediments, most from poorly-lithified sediments).

Size class: macrofossils

Collection methods: COLLECTOR: Presumably collected by the authors, Z.L. Aswan and T. Ozawa. REPOSITORY: Depart,emt of Geology, Institut Teknologi Bandung and the Graduate School of Environmental Sciences, Nagoya University.

Primary reference: Z. Y. Aswan. 2006. Milankovitch 41 000-year cycles in lithofaciesa and molluscan content in the tropical Middle Miocene Nyalindung Formation, Jawa, Indonesia. Palaeogeography, Palaeoclimatology, Palaeoecology 235:382-405 [A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 70175: authorized by Austin Hendy, entered by Austin Hendy on 19.03.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Not exhaustive but representative of most characteristic gastropods and bivalves within each unit. NOMENCLATURE: Not authoritative publication, but using modern nomenclature, subgenus and species-level designations.
Gastropoda
 Heterostropha - Ringiculidae
Ringicula arctatoides Martin 1879 snail
 Sorbeoconcha - Naticidae
Polinices peselephanti Link 1807 moon snail
Naticarius alapapilionis Röding 1798 moon snail
 Neogastropoda - Conidae
Conus (Lithoconus) tessulatus Born 1778 cone shell
 Neogastropoda - Buccinidae
Babylonia spirata Linnaeus 1758 true whelk
 Cerithioidea - Turritellidae
"Turritella bantamensis" = Turritella (Turritella) bantamensis
"Turritella bantamensis" = Turritella (Turritella) bantamensis Martin 1905 turret shell
Bivalvia
 Arcida - Arcidae
Anadara (Anadara) antiquata, "Anadara (Scapharca) suzukii" = Scapharca
Anadara (Anadara) antiquata Linnaeus 1758 ark
"Anadara (Scapharca) suzukii" = Scapharca clam
 Carditida - Carditidae
Cardita sp. Bruguière 1792 clam
 Cardiida - Veneridae
Paphia (Neotapes) undulata Born 1778 venus clam
"Veremolpa minuta" = Timoclea (Veremolpa) venus clam