PPP# 455 - La Bomba [Rio Banano Fm] (Pliocene of Costa Rica)

Also known as NMB Loc. 17778

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 79803: authorized by Arnold Miller, entered by Kate Bulinski on 24.03.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropoda, bivalvia and scaphopoda. NOMENCLATURE: modern nomenclature, though only identified to subgenus resolution.
unclassified
  -
Gastropoda
 Cerithioidea - Cerithiidae
Alabina sp. Dall 1902 cerith snail
 Sorbeoconcha - Strombidae
Strombus sp. Linnaeus 1758 conch
 Neogastropoda - Olividae
Oliva (Oliva) sp. Bruguière 1789 olive snail
 Neogastropoda - Buccinidae
Antillophos (Antillophos) sp. Woodring 1928 true whelk
 Neogastropoda - Nassariidae
Nassarius sp. Duméril 1806 snail
sensu lato
 Neogastropoda - Columbellidae
 Neogastropoda - Conidae
Conus sp. Linnaeus 1758 cone shell
 Neogastropoda - Mangeliidae
Ithycythara sp. Woodring 1928 snail
 Neogastropoda - Terebridae
Terebra (Oreoterebra) sp. Olsson 1967 auger snail
 Neogastropoda - Cancellariidae
Cancellaria sp. Lamarck 1799 snail
sensu lato
 Heterostropha - Ringiculidae
 Heterostropha - Pyramidellidae
Eulimastoma sp. Bartsch 1916 snail
 Heterostropha - Architectonicidae
Architectonica sp. Röding 1798 sundial
 Opisthobranchia - Cylichnidae
Cylichnella sp. Gabb 1873 snail
Acteocina sp. Gray 1847 barrel-bubble
Bivalvia
 Arcida - Noetiidae
Noetia sp. Gray 1857 clam
 Arcida - Arcidae
 Ostreida - Ostreidae
? Dendostrea sp. Swainson 1835 oyster
 Lucinida - Lucinidae
Parvilucina sp. Dall 1901 clam
sensu lato
"Lucinisca sp." = Lucina (Lucinisca) Dall 1901 clam
 Cardiida - Chamidae
Arcinella sp. Schumacher 1817 jewel box
 Cardiida - Veneridae
Macrocallista (Megapitaria) sp. Grant and Gale 1931 venus clam
Chionopsis sp. Olsson 1932 venus clam
 Carditida - Crassatellidae
Crassinella sp. Guppy 1874 clam
Scaphopoda
  -
Scaphopoda indet. Bronn 1862 tusk shell
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
sensu lato