Where: Costa Rica (10.5° N, 85.8° W)

• Paleocoordinates: 17.8° N, 67.1° W (Wright 2013)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Coniacian to Coniacian (89.8 - 83.6 Ma)

• The radiolarian assemblages of these outcrops are very homogeneous and contain all very similar assemblages, which can be tentatively assigned to a Coniacian-Santonian age by the presence of the following, biostratigraphically important species: Alievium praegallowayi Pessagno, (Coniacian - early Santonian); Hemicryptocapsa polyedra Dumitrica, (Santonian and older), Alievium gallowayi (White), (Coniacian to Maastrichian); Praeconocaryomma californiaensis Pessagno, (Turonian - Santonian), Theocampe urna Foreman (late Coniacian - middle Campanian).

• bed-level stratigraphic resolution

Environment/lithology: basinal (siliceous); lithified chert

Size class: microfossils

Collected by E. Kuijpers in 1977-1978

Primary reference: P. O. Baumgartner, K. Flores, A. N. Bandini, F. Girault, and D. Cruz. 2008. Upper Triassic to Cretaceous radiolaria from Nicaragua and northern Costa Rica - the Mesquito composite oceanic terrane. Ofioliti 33:1-19 [M. Clapham/M. Clapham]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 209715: authorized by Matthew Clapham, entered by Matthew Clapham on 12.05.2020

Creative Commons license: CC0 (CC0)