Where: Limon, Costa Rica (9.9° N, 83.1° W: paleocoordinates 9.8° N, 82.6° W)
• coordinate estimated from map
When: Rio Banano Formation, Late/Upper Pliocene (3.6 - 2.6 Ma)
• Underlying Formation: Unknown. Overlying Formation: Quebrada Chocolate Formation. Thickness: About 750 m. (Coates et al, 1992; McNeil et al, 2000).
Environment/lithology: coastal; massive, medium-grained, tuffaceous, brown, gray, green sandstone and massive, gray, blue siltstone
• Cassell 1986 mentions that the “Rio Banano sandstones were deposited on the inner continental shelf at a depth of about 10 to 20 meters. Nearshore sediment was carried out to the shelf area and redeposited.” This sentiment is echoed by multiple authors, including Denyer 1998; Coates et al, 1992; and McNeil et al, 2000. Furthermore, McNeil et al, 2000, mention that this is possibly marine deltaic sandstone. It is cross-bedded, which could indicate a shoreface facies, but since it is also possibly deltaic in nature, then “Coastal Indet.” Is a proper selection.
• The sandstone alternates in layers with siltstone. The top of the section is sandstone that is a medium sand with some silt, gray-dark green, tuffaceous. Some mollusk-rich shell hash and stringers, bivalves and gastropods are present. Just below is another section of sandstone that is massive with well-rounded volcanic pebbles, abundant shells, tubular burrows, and is green dark-gray. Just below this is a siltstone with some medium sand and volcanic pebbles (2-4 mm), abundant callianassid-type burrows filled pebbles and shell hash. Thius alternates back to gray-brown sandstone, with organic-rich volcanoclastics and abundant burrows. The rest of the section below is siltstone that is blue-gray, massive, and purvasively bioturbated (McNeil et al, 2000 - River Section (type)).
Size class: macrofossils
Primary reference: J. A. Todd and J. S. H. Collins. 2005. Neogene and Quaternary crabs (Crustacea, Decapoda) collected from Costa Rica and Panama by members of the Panama Paleontology Project. Bulletin of the Mizunami Fossil Museum 32:53-85 [A. Hendy/A. Hendy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 228542: authorized by Joanna Wolfe, entered by Arthur Lynch on 12.12.2022
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
| Malacostraca |
| Decapoda - Leucosiidae |
|