PPP# 456 - La Bomba [Rio Banano Fm] (Pliocene of Costa Rica)

Also known as NMB Loc. 17779

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:collections presumably held at USNM, BMNH and 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 79990: 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.
Gastropoda
 Cerithioidea - Cerithiidae
Alabina sp. Dall 1902 cerith snail
 Cerithioidea - Turritellidae
Turritella sp. Lamarck 1799 turret shell
 Sorbeoconcha - Naticidae
Stigmaulax sp. Morch 1852 moon snail
 Sorbeoconcha - Cassidae
"Phalium (Tylocassis) sp." = Semicassis
"Phalium (Tylocassis) sp." = Semicassis Mörch 1852 snail
 Neogastropoda - Drilliidae
Clathrodrillia sp. Dall 1918 snail
 Neogastropoda - Conidae
Conus sp. Linnaeus 1758 cone shell
 Neogastropoda - Terebridae
Strioterebrum sp. Sacco 1891 auger snail
 Neogastropoda - Nassariidae
Nassarius sp. Duméril 1806 snail
sensu lato
 Neogastropoda - Marginellidae
Prunum sp. Swainson 1840 margin shell
 Neogastropoda - Volutidae
Voluta sp. Linnaeaus 1758 volute
 Neogastropoda - Muricidae
Typhis sp. Montfort 1810 murex snail
 Neogastropoda - Olividae
Oliva (Oliva) sp. Bruguière 1789 olive snail
 Sorbeoconcha - Strombidae
Strombus sp. Linnaeus 1758 conch
 Thecosomata - Cavoliniidae
Cavolinia sp. Avilgaard 1791 snail
Creseis sp. Rang 1828 snail
 Thecosomata - Limacinidae
Limacina sp. Bosc 1817 snail
 Trochoidea - Solariellidae
Solariella sp. Wood 1842 snail
 Heterostropha - Pyramidellidae
Pyramidellidae indet. Gray 1840 snail
 Heterostropha - Architectonicidae
Architectonica sp. Röding 1798 sundial
Scaphopoda
  -
Scaphopoda indet. Bronn 1862 tusk shell
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
sensu lato
Tesseracme sp. Pilsbry 1898 tusk shell
Bivalvia
 Mytilida - Mytilidae
Botula sp. Mörch 1853 mussel
 Arcida - Arcidae
 Arcida - Glycymerididae
Axinactis (Glycymerella) sp. Woodring 1925 clam
Tucetona sp. Iredale 1939 clam
 Pectinida - Pectinoidae
Chlamys sp. Röding 1798 scallop
 Pectinida - Anomiidae
Anomia sp. Linnaeus 1758 jingle
 Lucinida - Lucinidae
Parvilucina sp. Dall 1901 clam
sensu lato
 Cardiida - Cardiidae
Trigoniocardia sp. Dall 1900 cockle
sensu lato
 Cardiida - Veneridae
Lirophora sp. Conrad 1863 venus clam
 Carditida - Crassatellidae
Crassinella sp. Guppy 1874 clam