El Mamey Formation

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El Mamey Formation
Stratigraphic range: Burdigalian-Langhian
Type Formation
Lithology
Primary Shale, sandstone, conglomerate
Other Dominican amber
Location
Coordinates 19°30′N70°42′W / 19.5°N 70.7°W / 19.5; -70.7 Coordinates: 19°30′N70°42′W / 19.5°N 70.7°W / 19.5; -70.7
Approximate paleocoordinates 19°18′N69°30′W / 19.3°N 69.5°W / 19.3; -69.5
CountryFlag of the Dominican Republic.svg  Dominican Republic
Dominican Republic relief location map.jpg
Yellow pog.svg
El Mamey Formation (the Dominican Republic)

The El Mamey Formation is a geologic formation in the Dominican Republic. The formation consists of shales and sandstones interspersed with a conglomerate of well-rounded pebbles, deposited in a fluvio-deltaic environment. El Mamey Formation is one of the formations containing Dominican amber and preserves fossils dating back to the Burdigalian to Langhian period. [1]

Dominican Republic country in the Caribbean

The Dominican Republic is a country located in 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 nation of Haiti, making Hispaniola one of two Caribbean islands, along with Saint Martin, that are shared by two sovereign states. The Dominican Republic is the second-largest Caribbean nation by area at 48,671 square kilometers (18,792 sq mi), and third by population with approximately 10 million people, of which approximately three million live in the metropolitan area of Santo Domingo, the capital city.

Shale A fine-grained, clastic sedimentary rock

Shale is a fine-grained, clastic sedimentary rock composed of mud that is a mix of flakes of clay minerals and tiny fragments of other minerals, especially quartz and calcite. Shale is characterized by breaks along thin laminae or parallel layering or bedding less than one centimeter in thickness, called fissility. It is the most common sedimentary rock.

Sandstone A clastic sedimentary rock composed mostly of sand-sized particles

Sandstone is a clastic sedimentary rock composed mainly of sand-sized mineral particles or rock fragments.

Contents

Fossil content

Roystonea palaea is an extinct species of palm known from fossil flowers found in the early Miocene Burdigalian stage Dominican amber deposits on the island of Hispaniola. The species is known from a single staminate flower and a single pistillate flower both preserved in the same piece of amber. The amber specimen bearing the holotype and paratype is currently deposited in the collections of the Oregon State University in Corvallis, Oregon, as number "Sd–9–101", where it was studied and described by Dr George Poinar. Dr Poinar published his 2002 type description for R. palaea in the Botanical Journal of the Linnean Society, Volume 139. The species' second name is taken from the Greek word palaios meaning "ancient". The amber specimen bearing the flowers was excavated from the La Toca mine northeast of Santiago de los Caballeros, Dominican Republic.

<i>Eleutherodactylus</i> genus of amphibians

Eleutherodactylus is a genus of frogs in the family Eleutherodactylidae. Many of the 185 species of the genus are commonly known as "rain frogs" or "robber frogs", due to their sharp, high-pitched, insect-like calls.

See also

La Toca Formation

The La Toca Formation is a geologic formation in the northern and eastern part of the Dominican Republic. The formation, predominantly an alternating sequence of marls and turbiditic sandstones, breccias and conglomerates, is renowned for the preservation of insects and other arthropods in amber, known as Dominican amber. The formation is dated to the Burdigalian to Langhian stages of the Miocene period.

Baitoa Formation

The Baitoa Formation is a geologic formation in Dominican Republic. The formation consists of siltstones and limestones deposited in a shallow marine to reef environment. The formation, unconformably overlying the Tabera Formation and unconformably overlain by the Cercado Formation, preserves bivalve, gastropod, echinoid and coral fossils dating back to the Burdigalian to Langhian period.

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 overlying the Baitoa Formation, preserves bivalve, gastropod, decapod and coral fossils dating back to the Late Miocene to Early Pliocene period.

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Los Hidalgos Place in Puerto Plata, Dominican Republic

Los Hidalgos is a town in the Puerto Plata province of the Dominican Republic. It has another name or a nickname if you want to say that, which is El Mamey. Most people call it by this name. The current mayor is Felix Sarita. It has one of the most outstanding park of the Dominican Republic. Around that park are different place to go and have an awesome (sicsic) time. It is also really close to the beach La Ensenada, about an hour away. It is also close to Villa Isabela where Cristopher Culumbus arrived in 1492. This town is divided in different sections such as Mamey Arriba, Alto de Los Acosta, Alto de Los Francisco, Pueblo Nuevo, Pinto etc.

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Yanigua Formation

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El Molino Formation

The El Molino Formation is a Maastrichtian geologic formation pertaining to the Puca Group of central Bolivia. The formation comprises fine-grained sandstones and sandy limestones with stromatolites deposited in a shallow marine to lacustrine environment. The formation has provided fossils of Dolichochampsa minima, and ichnofossils of Ankylosauria indet., Ornithopoda indet., Theropoda indet. and Titanosauridae indet. The tracksite of Cal Orcko is the best known example of the ichnofossil locations of the formation. The ichnofossil of Ligabueichnum bolivianum may be attributed to an ankylosaur. The fossil fish species Dasyatis molinoensis is named after the formation.

References

Further reading