Occurrence of late Aptian/earliest Albian radiolaria from ODP Hole 113-693A (Table 2), supplement to: Ling, Hsin Yi; Lazarus, David B (1990): Cretaceous radiolaria from the Weddell Sea: Leg 113 of the Ocean Drilling Program. In: Barker, PF, Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 353-363

• Main Authors: Ling, Hsin Yi, Lazarus, David B
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 1990
• Subjects: Sample code/label; Acanthocircus bispinus; Acanthocircus sp.; Actinomma sp.; Artostrobus sp.; Archaeodictyomitra squinaboli; Archaeospongoprunum sp.; Cornutella californica; Diacanthocapsa sp.; Dictyomitra sp.; Gorgansium sp.; Napora durhami; Napora sp.; Patulibracchium sp.; Protostichocapsa stocki; Protostichomitra pentacolaensis; Sethocapsa leiostraca; Spongocyclia trachodes; Spongodiscus sp.; Spongodiscus spp.; Squinabolella putahensis; Stichomitra sp.; Theocorys sp.; Tricolocapsa sp.; Tripodictya elegantissima; Drilling/drill rig; DSDP/ODP/IODP sample designation; Counting >63 µm fraction; Leg113; Joides Resolution; Ocean Drilling Program ODP; Antarctic; Antarctic Ocean; Kennett; The Antarctic; Weddell; Weddell Sea; Antarc*
• Online Access: https://dx.doi.org/10.1594/pangaea.746523; https://doi.pangaea.de/10.1594/PANGAEA.746523

Unusually well preserved Cretaceous radiolarians are observed in the subsurface sections from two drilled sites in the Weddell Sea collected during Leg 113 of the Ocean Drilling Program. Radiolarians from the lithified calcareous chalk of Hole 689B represent the first Campanian-Maestrichtian assemblage which is characterized by abundant Cromyodruppa Iconcentrica, Dictyomitra multicostata, and Protostichocapsa stocki. Abundant Pseudodictyomitra pentacolaensis and Diacanthocapsa sp. 1, on the other hand, are the main constituents of the assemblage from the latest Aptian/earliest Albian diatomite of Hole 693B. These represent the oldest and the highest-latitude reported radiolarian occurrences from the Atlantic sector of the Antarctic Ocean. The assemblages are marked by their low diversity and an absence of low- to mid-latitude zonal indices. : Relative abundance of taxa based on population counts of two strewn microslides (with cover glass of 22 * 40 mm size): A = abundant (>26 specimens), C = common (11-25 specimens), F = few (6-10 specimens), R = rare (2-5 specimens), + = single specimen, - = absent.