Distribution of Cretaceous and early Danian planktonic foraminifera in ODP Hole 119-738C (Table 1) ...

• Main Author: Huber, Brian T
• Format: Dataset
• Language: English
• Published: PANGAEA 1991
• Subjects: DEPTH, sediment/rock; Sample code/label; Epoch; Planktic foraminifera zone; Foraminifera, planktic abundance; Foraminifera, planktic preservation; Archaeoglobigerina australis; Globigerinelloides multispinus; Hedbergella monmouthensis; Heterohelix globulosa; Heterohelix planata; Hedbergella sliteri; Abathomphalus mayaroensis; Archaeoglobigerina mateola; Globotruncanella sp.; Heterohelix dentata; Rugotruncana circumnodifer; Rugoglobigerina rugosa; Globigerinelloides subcarinatus; Globigerinelloides impensus; Abathomphalus intermedius; Globotruncanella citae; Globotruncanella petaloidea; Gublerina robusta; Guembelitria cretacea; Hedbergella sp.; Pseudotextularia elegans; Schackoina multispinata; Zeauvigerina teuria; Chiloguembelina sp.; Chiloguembelina crinita; Eoglobigerina fringa; Eoglobigerina eobulloides; Eoglobigerina sp.; Bifarina alabamensis; Chiloguembelina waiparaensis; Eoglobigerina simplicissima; Globoconusa daubjergensis; Subbotina pseudobulloides; Foraminifera, benthic; Calcispheres; Drilling/drill rig; DSDP/ODP/IODP sample designation; Counting >63 µm fraction; Leg119; Joides Resolution; Ocean Drilling Program ODP; Kerguelen; Rugosa; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.728441; https://doi.pangaea.de/10.1594/PANGAEA.728441

A biostratigraphically complete upper Maestrichtian-Danian sequence was recovered at ODP Leg 119 Site 738 on the southern Kerguelen Plateau (62°S). Planktonic foraminifers are abundant and well to moderately preserved in all upper Maestrichtian samples to within 6 cm of the Cretaceous/Tertiary boundary, where foraminifers are rare and poorly preserved due to increased sediment lithification. Lowermost Danian samples are also poorly preserved, but specimen abundance is sufficient for preliminary quantitative biostratigraphic analysis. Despite the poor foraminifer preservation, evidence is presented for paleoenvironmental change immediately below a thin, iridium-rich calcareous clay horizon that is recognized as the Cretaceous/Tertiary boundary. The most significant indicators for preboundary change include; (1) loss of sediment bioturbation; (2) loss of keeled planktonic foraminifers; and (3) diminished size and diversity of benthic foraminifers. Planktonic foraminifers showing transitional morphologies ... : <1 present specimens found after the first 100 counts, ?1 = species questionable presented ...