(Table 1) Distribution of upper Campanian-lower Maestrichtian calcareous nannofossils at DSDP Hole 71-511

• Main Authors: Wind, Frank H, Wise, Sherwood W
• Format: Dataset
• Language: English
• Published: PANGAEA 1983
• Subjects: 71-511; Acuturris scotus; Ahmuellerella octoradiata; Arkhangelskiella cymbiformis; Arkhangelskiella specillata; Bidiscus rotatorius; Biscutum constans; Biscutum coronum; Biscutum dissimile; Biscutum magnum; Biscutum notaculum; Broinsonia enormis; Broinsonia parca; Broinsonia verecundia; Calculites obscurus; Centosphaera barbata; Ceratolithoides aculeus; Chiastozygus garrisonii; Corollithion rhombicum; Cretarhabdus conicus; Cretarhabdus sp.; Cretarhabdus surirellus; Cribrosphaerella ehrenbergii; Deep Sea Drilling Project; DEPTH; sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Eiffellithus turriseiffelii; Gartnerago obliquum; Glomar Challenger; Kamptnerius magnificus; Lapideacassis sp.; Leg71; Light microscope; Lithraphidites carniolensis; Lucianorhabdus plexus; Marthasterites inconspicuus; Microrhabdulus belgicus; Micula decussata; Misceomarginatus pleniporus; Monomarginatus pectinatus; Monomarginatus quaternarius; Nannofossil abundance; Nannofossils preservation; Nannofossil zone; Nephrolithus corystus; Octocyclus reinhardtii; Orcadas; Falkland Plateau; South Atlantic Ocean
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.815175; https://doi.org/10.1594/PANGAEA.815175

Calcareous nannofossils from upper Campanian-lower Maestrichtian Deep Sea Drilling Project Leg 71 Cores 511-23 and 511-24 are described and correlated with assemblages of similar age from piston and drill cores on the Falkland Plateau, South Atlantic Ocean. The Leg 71 cores partially fill a drilling gap of at least 20 meters left within a thick (50 m) carbonate section first drilled by DSDP Leg 36 at Site 327. Cores 511-23 and 511-24 both fall within the upper portion of the Biscutum coronum Zone of Wind and demonstrate an overlap in the range of Monomarginatus quaternarius with the ranges of M. pectinatus, Misceomarginatus pleniporus, and Biscutum coronum across the Campanian/ Maestrichtian boundary. Resolution of the sequence of highest occurrence datums for the latter species must await the recovery of a more complete section. Comparison of the Site 511 assemblages with those from Mas Orcadas Core 07-75-44 to the north confirms earlier speculation that the Falkland Plateau served as an important boundary between major water masses during the Late Cretaceous.