(Table 1) Distribution of lower to middle Eocene calcareous nannofossils in DSDP Hole 93-605
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
1987
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| _version_ | 1867172247594074112 |
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| author | Applegate, Joseph L Wise, Sherwood W |
| author_facet | Applegate, Joseph L Wise, Sherwood W |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Deep Sea Drilling Project Site 605 recovered a nearly continuous and thick (366 m) lower to middle Eocene carbonate sequence. The diversity of nannofossils is quite high and coccoliths are generally abundant to very abundant. Preservation is moderate in the upper part of the sequence and poor in the lower part, corresponding to a marked decrease in the biogenic silica content. Unrestricted open marine conditions are indicated by the high pelagic content of the section. The proximity to the continent is suggested by the early representatives of Tribrachiatus in CP9a and the occurrence of braarudosphaerids where preservation is moderate. Strict application of the low latitude zonation of Bukry is hindered somewhat in two instances by (1) the apparent absence of the zonal marker Coccolithus crassus in this section, and (2) the unanticipated overlap of the subzonal markers Chiasmolithus gigas and Reticulofenestra umbilica over 53.1 m of section. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_232342 |
| institution | PANGAEA |
| language | en |
| publishDate | 1987 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Distribution of lower to middle Eocene calcareous nannofossils in DSDP Hole 93-605 Applegate, Joseph L Wise, Sherwood W 93-605; Blackites spinosis; Blackites tenuis; Braarudosphaera bigelowii; Braarudosphaera discula; Calcidiscus kingii; Campylosphaera dela; Cepekiella lumina; Chiasmolithus bidens; Chiasmolithus californicus; Chiasmolithus consuetus; Chiasmolithus eograndis; Chiasmolithus expansus; Chiasmolithus gigas; Chiasmolithus grandis; Chiasmolithus solitus; Chiasmolithus titus; Chiphragmalithus acanthodes; Chiphragmalithus calathus; Coccolithus cribellum; Coccolithus formosus; Coccolithus pelagicus; Coccolithus staurion; Deep Sea Drilling Project; DEPTH, sediment/rock; Discoaster barbadiensis; Discoaster binodosus; Discoaster diastypus; Discoaster distinctus; Discoaster falcatus; Discoaster gemmifer; Discoaster kuepperi; Discoaster lodoensis; Discoaster mediosus; Discoaster mirus; Discoaster multiradiatus; Discoaster nobilis; Discoaster saipanensis; Discoaster septemradiatus; Discoaster strictus; Discoaster sublodoensis; Discoaster woodringii; Discolithina rimosa; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Ellipsolithus distichus; Ellipsolithus macellus; Epoch; Fasciculithus schaubii; Fasciculithus tympaniformis; Glomar Challenger; Helicosphaera lophota; Helicosphaera seminulum; Helicosphaera sp.; Leg93; Lithologic unit/sequence; Markalius inversus; Nannofossil abundance; Nannofossils preservation; Nannofossil zone; Nannofossil Zone; Martini, 1971; Nannofossil Zone; Okada & Bukry, 1980; Nannotetrina cristata; Nannotetrina quadrata; Neococcolithes dubius; Neococcolithes protenus; North Atlantic Ocean; Pontosphaera multipora; Pontosphaera plana; Pontosphaera pulchra; Reticulofenestra dictyoda; Reticulofenestra samodurovii; Reticulofenestra sp.; Reticulofenestra umbilicus; Rhabdosphaera inflata; Rhabdosphaera morionum; Sample code/label; Smear slide analysis; Sphenolithus anarrhopus; Sphenolithus conspicuus; Sphenolithus editus; Sphenolithus furcatolithoides; Sphenolithus moriformis; Sphenolithus primus; Sphenolithus radians; Sphenolithus spiniger; Toweius callosus; Toweius eminens; Toweius gammation; Toweius pertusus; Tribrachiatus bramlettei; Tribrachiatus contortus; Tribrachiatus orthostylus; Zygolithus chiastus; Zygrhablithus bijugatus Deep Sea Drilling Project Site 605 recovered a nearly continuous and thick (366 m) lower to middle Eocene carbonate sequence. The diversity of nannofossils is quite high and coccoliths are generally abundant to very abundant. Preservation is moderate in the upper part of the sequence and poor in the lower part, corresponding to a marked decrease in the biogenic silica content. Unrestricted open marine conditions are indicated by the high pelagic content of the section. The proximity to the continent is suggested by the early representatives of Tribrachiatus in CP9a and the occurrence of braarudosphaerids where preservation is moderate. Strict application of the low latitude zonation of Bukry is hindered somewhat in two instances by (1) the apparent absence of the zonal marker Coccolithus crassus in this section, and (2) the unanticipated overlap of the subzonal markers Chiasmolithus gigas and Reticulofenestra umbilica over 53.1 m of section. |
| title | (Table 1) Distribution of lower to middle Eocene calcareous nannofossils in DSDP Hole 93-605 |
| topic | 93-605; Blackites spinosis; Blackites tenuis; Braarudosphaera bigelowii; Braarudosphaera discula; Calcidiscus kingii; Campylosphaera dela; Cepekiella lumina; Chiasmolithus bidens; Chiasmolithus californicus; Chiasmolithus consuetus; Chiasmolithus eograndis; Chiasmolithus expansus; Chiasmolithus gigas; Chiasmolithus grandis; Chiasmolithus solitus; Chiasmolithus titus; Chiphragmalithus acanthodes; Chiphragmalithus calathus; Coccolithus cribellum; Coccolithus formosus; Coccolithus pelagicus; Coccolithus staurion; Deep Sea Drilling Project; DEPTH, sediment/rock; Discoaster barbadiensis; Discoaster binodosus; Discoaster diastypus; Discoaster distinctus; Discoaster falcatus; Discoaster gemmifer; Discoaster kuepperi; Discoaster lodoensis; Discoaster mediosus; Discoaster mirus; Discoaster multiradiatus; Discoaster nobilis; Discoaster saipanensis; Discoaster septemradiatus; Discoaster strictus; Discoaster sublodoensis; Discoaster woodringii; Discolithina rimosa; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Ellipsolithus distichus; Ellipsolithus macellus; Epoch; Fasciculithus schaubii; Fasciculithus tympaniformis; Glomar Challenger; Helicosphaera lophota; Helicosphaera seminulum; Helicosphaera sp.; Leg93; Lithologic unit/sequence; Markalius inversus; Nannofossil abundance; Nannofossils preservation; Nannofossil zone; Nannofossil Zone; Martini, 1971; Nannofossil Zone; Okada & Bukry, 1980; Nannotetrina cristata; Nannotetrina quadrata; Neococcolithes dubius; Neococcolithes protenus; North Atlantic Ocean; Pontosphaera multipora; Pontosphaera plana; Pontosphaera pulchra; Reticulofenestra dictyoda; Reticulofenestra samodurovii; Reticulofenestra sp.; Reticulofenestra umbilicus; Rhabdosphaera inflata; Rhabdosphaera morionum; Sample code/label; Smear slide analysis; Sphenolithus anarrhopus; Sphenolithus conspicuus; Sphenolithus editus; Sphenolithus furcatolithoides; Sphenolithus moriformis; Sphenolithus primus; Sphenolithus radians; Sphenolithus spiniger; Toweius callosus; Toweius eminens; Toweius gammation; Toweius pertusus; Tribrachiatus bramlettei; Tribrachiatus contortus; Tribrachiatus orthostylus; Zygolithus chiastus; Zygrhablithus bijugatus |
| url | https://doi.org/10.1594/PANGAEA.232342 |