Organismos de un arrecife-fósil (Oligoceno Superior-Mioccno Inferior),del Caribe de Costa Rica

Aguilar Alvarez, Ana Teresita

dc.creator	Aguilar Alvarez, Ana Teresita
dc.date	2015-05-12
dc.date.accessioned	2016-05-03T15:29:28Z
dc.date.available	2016-05-03T15:29:28Z
dc.identifier	http://revistas.ucr.ac.cr/index.php/rbt/article/view/19184
dc.identifier.uri	https://hdl.handle.net/10669/26655
dc.description	Tbis paper describes tbe fossils, materials and paleoenviromnental conditions found in some outcrops near tbe town of Jesús María, Turrialba, Costa Rica. Tbe rock materials (reefal limestone, sandstones and conglomerates) are associated to tbe Punta Pelada Forrnation of Upper Oligocene tu Lower Miocene age. Outcrops are of reduced extent and are unevenly distributed, hence tbey are considered as patch reefs developed by enviromnental energy fluctuations, sea level changes and clastic sedimentation from sources on small islands acting togetber in narrow platforrns. Tbe structural and enviromnental characteristics where fossil communities developed were derived from tbe analysis of 460 samples containing 36 species. Tbe reefs represent low diversity communities comprising four coral species (three of tbem reef builders), 31 mollusks species (21 gastropods: a new species, 14 camivores, three herbivores and three of uncertain feeding habits; 10 bivalves species: five endobentbic and five epibentbic); algae ( at least three groups represented); sea urchins; foraminifers; crabs. Tbe eveuness index is low, mainly regarding tbe Scleractinian corals, where Antiguastrea cellulosa predominates (80% óf tbe recognized forrns). Tbe fossil assemblage suggests tbat tbe comm\lnities developed in shallow marine enviromnents (50-80 m deptb), affected by sea level changes, strung marine currents and clastic imput from nearby small islands.	en-US
dc.description	This paper describes tbe fossils, materials and paleoenviromnental conditions found in some outcrops near tbe town of Jesús María, Turrialba, Costa Rica. Tbe rock materials (reefal limestone, sandstones and conglomerates) are associated to tbe Punta Pelada Forrnation of Upper Oligocene tu Lower Miocene age. Outcrops are of reduced extent and are unevenly distributed, hence tbey are considered as patch reefs developed by enviromnental energy fluctuations, sea level changes and clastic sedimentation from sources on small islands acting togetber in narrow platforrns. Tbe structural and enviromnental characteristics where fossil communities developed were derived from tbe analysis of 460 samples containing 36 species. Tbe reefs represent low diversity communities comprising four coral species (three of tbem reef builders), 31 mollusks species (21 gastropods: a new species, 14 camivores, three herbivores and three of uncertain feeding habits; 10 bivalves species: five endobentbic and five epibentbic); algae ( at least three groups represented); sea urchins; foraminifers; crabs. Tbe eveuness index is low, mainly regarding tbe Scleractinian corals, where Antiguastrea cellulosa predominates (80% óf tbe recognized forrns). Tbe fossil assemblage suggests tbat tbe comm\lnities developed in shallow marine enviromnents (50-80 m deptb), affected by sea level changes, strung marine currents and clastic imput from nearby small islands.	es-ES
dc.format	application/pdf
dc.language	spa
dc.publisher	Universidad de Costa Rica	en-US
dc.rights	Copyright (c) 2015 International Journal of Tropical Biology and Conservation	en-US
dc.source	Revista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 47 (3) June 1999; 453-474	en-US
dc.source	Revista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 47 (3) June 1999; 453-474	es-ES
dc.source	Revista Biología Tropical; Vol. 47 (3) June 1999; 453-474	pt-PT
dc.source	2215-2075
dc.source	0034-7744
dc.subject	fossils	en-US
dc.subject	systematics	en-US
dc.subject	corals	en-US
dc.subject	mollusks	en-US
dc.subject	upper oligocene	en-US
dc.subject	lower miocene	en-US
dc.subject	Costa Rica	en-US
dc.title	Organismos de un arrecife-fósil (Oligoceno Superior-Mioccno Inferior),del Caribe de Costa Rica	en-US
dc.title	Organismos de un arrecife-fósil (Oligoceno Superior-Mioccno Inferior),del Caribe de Costa Rica	es-ES
dc.type	artículo original

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