The Baitoa Formation is a

geologic formation A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics ( lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exp ...

Dominican Republic The Dominican Republic ( ; es, República Dominicana, ) is a country located on the island of Hispaniola in the Greater Antilles archipelago of the Caribbean region. It occupies the eastern five-eighths of the island, which it shares with ...

. The formation consists of siltstones and

limestone Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms whe ...

s deposited in a shallow marine to

reef A reef is a ridge or shoal of rock, coral or similar relatively stable material, lying beneath the surface of a natural body of water. Many reefs result from natural, abiotic processes— deposition of sand, wave erosion planing down rock o ...

environment. The formation, unconformably overlying the Tabera Formation and unconformably overlain by the

Cercado Formation The Cercado Formation is a geologic group in Dominican Republic. The formation comprises siltstones, limestones, claystones, sandstones and conglomerates deposited in a shallow marine to reef environment. The Cercado Formation, unconformably ...

, preserves bivalve, gastropod,

echinoid Sea urchins () are spiny, globular echinoderms in the class Echinoidea. About 950 species of sea urchin live on the seabed of every ocean and inhabit every depth zone from the intertidal seashore down to . The spherical, hard shells (tests) of ...

and

coral Corals are marine invertebrates within the class Anthozoa of the phylum Cnidaria. They typically form compact colonies of many identical individual polyps. Coral species include the important reef builders that inhabit tropical oceans and ...

fossils dating back to the

Burdigalian The Burdigalian is, in the geologic timescale, an age or stage in the early Miocene. It spans the time between 20.43 ± 0.05 Ma and 15.97 ± 0.05 Ma (million years ago). Preceded by the Aquitanian, the Burdigalian was the first and longest w ...

Langhian The Langhian is, in the International Commission on Stratigraphy, ICS geologic timescale, an age (geology), age or stage (stratigraphy), stage in the middle Miocene epoch (geology), Epoch/series (stratigraphy), Series. It spans the time between 15 ...

period Period may refer to: Common uses * Era, a length or span of time * Full stop (or period), a punctuation mark Arts, entertainment, and media * Period (music), a concept in musical composition * Periodic sentence (or rhetorical period), a concept ...

.Baitoa Formation
at Fossilworks.org

References

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* S. D. Cairns and J. W. Wells. 1987. Neogene paleontology in the northern Dominican Republic, 5. The suborders Caryophylliina and Dendrophylliina (Anthozoa, Scleractinia). Bulletins of American Paleontology 93(328):23-43 * L. Dolin. 1991. Cypraeoidea and Lamellarioidea (Mollusca: Gastropoda), from the Chipola Formation (late early Miocene) of northwestern Florida. Tulane Studies in Geology and Paleontology 24(1-2):1-60 * A. B. Foster. 1986. Neogene paleontology in the northern Dominican Republic, 3. The family Poritidae (Anthozoa, Scleractinia). Bulletins of American Paleontology 90:47-123 * J. B. Saunders, P. Jung, and B. Biju-Duval. 1986. Neogene Paleontology in the Northern Dominican Republic: 1. Field Surveys, Lithology, Environment, and Age. Bulletins of American Paleontology 89(323):1-79 * H. E. Vokes and E. H. Vokes. 1968. Variation in the genus ''Orthaulax'' (Mollusca: Gastropoda). Tulane Studies in Geology and Paleontology 6(2):71-84 Geologic formations of the Dominican Republic Neogene Dominican Republic Burdigalian Langhian Siltstone formations Limestone formations Shallow marine deposits Reef deposits

See also

References

Further reading