Arrecifes coralinos del Oligoceno Superior-Mioceno Inferior, de Turrialba, Costa Rica
में बचाया:
| लेखकों: | , |
|---|---|
| स्वरूप: | artículo original |
| स्थिति: | Versión publicada |
| प्रकाशन तिथि: | 2001 |
| विवरण: | The outcrops at Jesús María (Turrialba, Cartago Province, Costa Rica) present limestone sequences 12 to 30 m thick (packstones: biolithites, biomicrites; and wackstones: biosparites, biomicrosparites), sandstones and conglomerates of Upper Oligocene-Lower Miocene age, correlated to the Punta Pelada Formation. The limestones are characterized by patch reefs with an irregular distribution and a reduced lateral extension (50 m), composed of corals (40%), calcareous algae and foraminiferans (30%), mollusks (20%), and in minor amounts fragments of barnacles, decapods, echinoderms and bryozoans. They consisted of low diversity communities possibly due to diverse geographical, geological and tectonic factors: a narrow continental shelf, very shallow and isolated environments, sea level fluctuations, and exposure to clastic sedimentation associated with intermitent volcanic activity. Equity was also low, with corals making up 40% of all macrofossils, and one species, Antiguastrea cellulosa, as predominant (80% of the corals present). These bioconstructions were developed in an open circulation lagoon environment with transitions, in several occassions, to shallower environments represented by clastic sediments. |
| देश: | Portal de Revistas UCR |
| संस्थान: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| भाषा: | Español |
| OAI Identifier: | oai:portal.ucr.ac.cr:article/26328 |
| ऑनलाइन पहुंच: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/26328 |
| संकेत शब्द: | Fossil reef Oligocene Miocene Costa Rica patch reef Antiguastrea |