Occurence of microfossils in Early Cretaceous sediments of DSDP Hole 25-249 (Tab. 1)

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Main Author: Riegraf, Wolfgang
Format: Dataset Open Access
Language:en
Published: PANGAEA 1978
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author Riegraf, Wolfgang
author_facet Riegraf, Wolfgang
collection Datos científicos de ciencias marinas y ambientales
contents From 12 radiolarian-rich claystone samples of the DSDP-Leg 25, Site 249, situated in the western Indian Ocean southwest of Madagascar 4 species of agglutinated and 38 species of calcareous benthonic foraminifera are described, 13 of them in open nomenclature. As a lot of Valanginian species and Gavelinella barremiana occur in the foraminiferal faunas described here a Valanginian-Hauterivian age is assigned to them. These microfaunas investigated here yield some index species characteristic in the Lower Cretaceous deposits of Northern Germany and also from the near-by Madagascar. Nodosariids dominate in a striking way with 36 species, especially of Astacolus, Citharina, Lenticulina, Lingulina, Marginulinopsis, Nodosaria, Saracenaria, and Vaginulina. Important Neocomian species well-known from other DSDP sites, namely Praedorothia ouachensis (SIGAL) and planktonic foraminifers, are missing. The microfaunas of Site 249 have to be derived from shelf areas.
format Dataset Open Access
id pangaea_https___doi_org_10_1594_PANGAEA_669647
institution PANGAEA
language en
publishDate 1978
publisher PANGAEA
record_format pangaea
spellingShingle Occurence of microfossils in Early Cretaceous sediments of DSDP Hole 25-249 (Tab. 1)
Riegraf, Wolfgang
25-249; Ammobaculites sp.; Astacolus cephalotes; Astacolus microdictyotus; Citharina harpa; Citharina sp.; Citharina truncata; Deep Sea Drilling Project; Dentalina debilis; Dentalina sp.; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Eoguttulina bilocularis; Fish remains; Foraminifera, benthic; Gavelinella barremiana; Globulina bucculenta; Glomar Challenger; Glomospirella gaultina; Indian Ocean//RIDGE; Leg25; Lenticulina nodosa; Lenticulina roemeri; Lenticulina saxonica; Lingulina biformis; Lingulina lamellata; Lingulina semiornata; Lingulina sp.; Lithologic unit/sequence; Marginulina caelata; Marginulina inaequalis; Marginulinopsis bettenstaedti; Marginulinopsis matutina; Nodosaria obscura; Nodosaria sp.; Ophiuroidea remains; Ostracoda; Paalzowella feifeli; Palmula crepidularis; Palmula malakialinensis; Palmula sp.; Porifera spiculae; Pseudonodosaria humilis; Radiolarians abundance; Ramulina tappanae; Reophax aff. eckernex; Reophax sp.; Sample code/label; Saracenaria crassicosta; Saracenaria lutanata; Tristix acutangulus; Vaginulina recta
From 12 radiolarian-rich claystone samples of the DSDP-Leg 25, Site 249, situated in the western Indian Ocean southwest of Madagascar 4 species of agglutinated and 38 species of calcareous benthonic foraminifera are described, 13 of them in open nomenclature. As a lot of Valanginian species and Gavelinella barremiana occur in the foraminiferal faunas described here a Valanginian-Hauterivian age is assigned to them. These microfaunas investigated here yield some index species characteristic in the Lower Cretaceous deposits of Northern Germany and also from the near-by Madagascar. Nodosariids dominate in a striking way with 36 species, especially of Astacolus, Citharina, Lenticulina, Lingulina, Marginulinopsis, Nodosaria, Saracenaria, and Vaginulina. Important Neocomian species well-known from other DSDP sites, namely Praedorothia ouachensis (SIGAL) and planktonic foraminifers, are missing. The microfaunas of Site 249 have to be derived from shelf areas.
title Occurence of microfossils in Early Cretaceous sediments of DSDP Hole 25-249 (Tab. 1)
topic 25-249; Ammobaculites sp.; Astacolus cephalotes; Astacolus microdictyotus; Citharina harpa; Citharina sp.; Citharina truncata; Deep Sea Drilling Project; Dentalina debilis; Dentalina sp.; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Eoguttulina bilocularis; Fish remains; Foraminifera, benthic; Gavelinella barremiana; Globulina bucculenta; Glomar Challenger; Glomospirella gaultina; Indian Ocean//RIDGE; Leg25; Lenticulina nodosa; Lenticulina roemeri; Lenticulina saxonica; Lingulina biformis; Lingulina lamellata; Lingulina semiornata; Lingulina sp.; Lithologic unit/sequence; Marginulina caelata; Marginulina inaequalis; Marginulinopsis bettenstaedti; Marginulinopsis matutina; Nodosaria obscura; Nodosaria sp.; Ophiuroidea remains; Ostracoda; Paalzowella feifeli; Palmula crepidularis; Palmula malakialinensis; Palmula sp.; Porifera spiculae; Pseudonodosaria humilis; Radiolarians abundance; Ramulina tappanae; Reophax aff. eckernex; Reophax sp.; Sample code/label; Saracenaria crassicosta; Saracenaria lutanata; Tristix acutangulus; Vaginulina recta
url https://doi.org/10.1594/PANGAEA.669647