PPP# 457 - La Bomba [Rio Banano Fm) (Pliocene of Costa Rica)

Also known as NMB Loc. 17780

Where: Limon, Costa Rica (9.9° N, 83.1° W: paleocoordinates 9.8° N, 83.2° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Rio Banano Formation (Limon Group), Piacenzian (3.6 - 2.6 Ma)

• The Rio Banano Formation sits diachronously with abrupt lithological transition on the Uscari Formation, mostly conformably and sometimes disconformably. The Rio Banano Formation passes conformably into the Quebrada Chocolate Formation in the area immediately west of Limon but throughout most of the southern Limon Basin it is unconformably overlain by the breccia and coarse grained volcaniclastics of the Suretka Formation. AGE: direct date extrapolated from Bybell (1999) and Collins et al. (1999).

• bed-level stratigraphic resolution

Environment/lithology: deltaic; bioturbated, coarse-grained, concretionary, tuffaceous sandstone and burrowed, tuffaceous, silty siltstone

• Thick deltaic succession.
• The sections at Quitaria and Bomba show two relatively thin, richly fossiliferous marine units with a thick deltaic section of burrow-mottled, coarse, tuffaceous, concretionary sandstone that frequently contains basalt pebbles, leaves, seeds and wood fragments. The lower marine section is exposed showing 15m of burrow-mottled, shelly clayey siltstone and silty, tuffaceous sanstone wiht frequent shelly stringers and lenses that contain an abundant and diverse marine mollusk and bryozoan assemblage. Thallasinoid burrow systems are common, often packed with shell hash, as are slabby and irregular concretion zones.

Size class: macrofossils

Collected by Jung et al. in 1988; reposited in the NMB

Collection methods: bulk, sieve,

• COLLECTORS: Peter Jung, R. Panchaud & Claudia Mora, 29.3.1988. REPOSITORIES: Naturhistorisches Museum Basel (NMB),

Primary reference: L. S. Collins and A. G. Coates. 1999. A paleobiotic survey of Caribbean faunas from the Neogene of the Isthmus of Panama. Bulletins of American Paleontology (357) [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 79991: authorized by Austin Hendy, entered by Kate Bulinski on 31.03.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropoda, bivalvia and scaphopoda. NOMENCLATURE: modern nomenclature, though only identified to subgenus resolution.
Tubothalamea
 Miliolida - Neodiscidae
Crassispira (Crassispirella) sp. Gaillot and Vachard 2007
Gastropoda
 Vanikoroidea - Eulimidae
Eulimidae indet. Philippi 1853 snail
 Cerithioidea - Turritellidae
Turritella sp. Lamarck 1799 turret shell
 Cerithioidea - Cerithiidae
Alabina sp. Dall 1902 cerith snail
Rhinoclavis (Ochetoclava) sp. Woodring 1928 cerith snail
 Neogastropoda - Olividae
Olivella (Olivella) sp. Swainson 1831 olive snail
 Neogastropoda - Turridae
Polystira sp. Woodring 1928 turrid
 Neogastropoda - Conidae
Conus sp. Linnaeus 1758 cone shell
 Neogastropoda - Clathurellidae
Nannodiella sp. Dall 1919 snail
 Sorbeoconcha - Ovulidae
Simnia sp. Risso 1826 snail
 Sorbeoconcha - Caecidae
Caecidae indet. Gray 1850 snail
 Thecosomata - Limacinidae
Limacina sp. Bosc 1817 snail
 Thecosomata - Cavoliniidae
Creseis sp. Rang 1828 snail
 Heterostropha - Pyramidellidae
Pyramidellidae indet. Gray 1840 snail
Eulimastoma sp. Bartsch 1916 snail
Bivalvia
 Poromyida - Cuspidariidae
Cardiomya sp. Adams 1864 clam
 Pholadida - Corbulidae
Caryocorbula sp. Gardner 1926 clam
 Cardiida - Chamidae
Arcinella sp. Schumacher 1817 jewel box
 Ostreida - Ostreidae
Ostreidae indet. Rafinesque 1815 oyster
 Pectinida - Anomiidae
Anomia sp. Linnaeus 1758 jingle
 Pectinida - Propeamussiidae
Cyclopecten sp. Verrill 1897 mud scallop