PPP# 484 - Cativa [lower Gatun Fm] (Miocene of Panama)

Also known as NMB Loc. 17865

Where: Colon, Panama (9.4° N, 79.9° W: paleocoordinates 9.1° N, 78.5° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: lower Gatun Member (Gatun Formation), Tortonian (11.6 - 7.2 Ma)

• STRATIGRAPHIC RELATIONS: The Gatun Fm rests unconformably on formations of different ages in different parts of the Panama Canal Basin. To the east of Colon, the Gatun Fm rests nonconformably on unamed Cretaceous volcanics. To the west of Colon, including several islands in Lake Gatun, the Gatun Fm rests with angular unconformity on the upper Oligocene Caimito Fm. BIOSTRATIGRAPHY: The Middle Gatun Fm is early Late Miocene (8.8-8.3 MA) according to Collins et al. (1999). Local section name: Sabanita to Payardi. AGE: Tortonian based on more recent dating (Hendy, 2012). Sr dating for nearby sections indicates an age of approximately 10.9 Ma (Hendy, unpublished data).

• bed-level stratigraphic resolution

Environment/lithology: coastal; unlithified, bioturbated siltstone and unlithified, bioturbated siltstone

• ENVIRONMENT: from Collins et al. (1999), open, inner neritic.
• GENERAL LITHOLOGY: From Collins et al. (1999), the Middle Gatun Fm consists of alternating siltstone and sandstone with occasional 4-5 m units of interbedded sandstone and conglomerate. Pervasive bioturbation is extensive. LITHIFICATION: lithification data not reported, but assumed to be unlithified based on observation of specimens in Woodring (1957-1982).

Size class: macrofossils

Reposited in the NMB

Collection methods: bulk, sieve,

• COLLECTORS: unknown (PPP staff) collected on 6/12/88. 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 79834: authorized by Arnold Miller, entered by Kate Bulinski on 25.03.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropoda, bivalvia and scaphopoda. NOMENCLATURE: modern nomenclature, though only identified to subgenus resolution.
Bivalvia
 Pectinida - Pectinoidae
Flabellipecten sp. Sacco 1897 scallop
Argopecten sp. Monterosato 1889 calico scallop
Amusium sp. Röding 1798 scallop
 Arcida - Arcidae
Anadara (Rasia) sp. Gray 1857 ark
 Cardiida - Cardiidae
Trigoniocardia sp. Dall 1900 cockle
sensu lato
 Cardiida - Veneridae
Lirophora sp. Conrad 1863 venus clam
Gastropoda
 Heterostropha - Architectonicidae
Architectonica sp. Röding 1798 sundial
 Neotaenioglossa - Calyptraeidae
Crucibulum (Crucibulum) sp. Schumacher 1817 slipper shell
 Neogastropoda - Cancellariidae
Cancellaria sp. Lamarck 1799 snail
sensu lato
 Neogastropoda - Drilliidae
Hindsiclava sp. Hertlein and Strong 1955 snail
 Neogastropoda - Terebridae
Strioterebrum sp. Sacco 1891 auger snail
 Neogastropoda - Turridae
Gemmula sp. Weinkauff 1875 turrid
Polystira sp. Woodring 1928 turrid
 Neogastropoda - Buccinidae
Strombinophos sp. Pilsbry and Olsson 1941 true whelk
 Sorbeoconcha - Naticidae
Stigmaulax sp. Morch 1852 moon snail
 Cerithioidea - Turritellidae
Turritella sp. Lamarck 1799 turret shell