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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
1992
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| Online Access: | https://doi.org/10.1594/PANGAEA.770684 |
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| _version_ | 1867169983754141696 |
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| author | Wightman, Winton G |
| author_facet | Wightman, Winton G |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Reworked shallow-water larger and deep-water calcareous benthic foraminifers were recovered from foraminiferal packstones and nannofossil chalks in Hole 802A. The autochthonous zeolitic pelagic claystone is characterized by late Campanian abyssal agglutinated foraminifers that allow correlation with the North Atlantic and the adjacent Pigafetta Basin. Assemblages of DendrophryalRhizammina in graded beds within the zeolitic claystone indicate reworking through entrainment in the flocculent E layer of turbidites, rather than recolonization following a biosiliceous event. Background sedimentation of the claystone took place below the carbonate compensation depth. The nannofossil chalk contains reworked lower bathyal to abyssal calcareous foraminifers of late Paleocene to early Miocene age. The topmost bed of the nannofossil chalk unit commences with an algal foraminiferal packstone containing Lepidocyclina sumatrensis, Heterostegina borneensis, Amphistegina hauerina, Asterigerina marshallana, and A. tentoria, which indicate that the source area was a shallow-water reef and allow the bed to be dated as early Miocene. The absence of obviously younger planktonic microfossils in the graded bed indicates that the resedimentation event was generally contemporaneous with original deposition and took place during an early Miocene global sea-level highstand. An early Miocene shallow-water assemblage is also seen in the graded beds at the base of a volcaniclastic turbidite sequence overlying the nannofossil chalks. Resedimentation of this unit was associated with volcanic activity some distance away. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_770684 |
| institution | PANGAEA |
| language | en |
| publishDate | 1992 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Distribution of Cretaceous-Tertiary benthic foraminifers in ODP Hole 129-802A Wightman, Winton G 129-802A; Amphistegina hauerina; Angulogerina angulosa; Aragonia ouezzanensis; Aragonia velascoensis; Asterigerina marshallana; Asterigerina tentoria; Bolivina sp.; Bolivina spp.; Bulimina tuxpamensis; Cassidulina subtumida; Cibicides ribbingi; Cibicides spp.; Cibicidoides voltzianus; Counting >63 µm fraction; Dendrophyra latissima; Dentalina spp.; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Epistomina caracolla; Gaudryina pyramidata; Globorotalites michelinianus; Glomospira charoides; Gyroidinoides beisseli; Gyroidinoides cf. praeglobosus; Haplophragmoides biumbilicalis; Haplophragmoides herbichi; Haplophragmoides spp.; Heterostegina borneensis; Hormosina crassa; Hormosina ovulum; Hyperammina dilatata; Joides Resolution; Leg129; Lenticulina sp.; Lenticulina spp.; Lepidocyclina sumatrensis; Loxostomum eleyi; North Pacific Ocean; Number of species; Ocean Drilling Program; ODP; Oridorsalis umbonatus; Orthomorphina aff. antillea; Orthomorphina cf. columnaris; Pararotalia armata; Paratrochamminoides corpulentus; Paratrochamminoides intricatus; Planulina cf. wuellerstorfi; Plectorecurvoides rotundus; Pleurostomella cf. alternans; Praebulimina cushmani; Praecystammina globigerinaeformis; Pullenia minuta; Reussella cf. pseudospinulosa; Rhizammina sp.; Rotalia tectoria; Saccammina sphaerica; Sample code/label; Siphonina cf. tenuicarinata; Stilostomella lepidula; Stilostomella pseudoscripta; Stilostomella sp.; Subreophax scalaris; Trochammina depressa Reworked shallow-water larger and deep-water calcareous benthic foraminifers were recovered from foraminiferal packstones and nannofossil chalks in Hole 802A. The autochthonous zeolitic pelagic claystone is characterized by late Campanian abyssal agglutinated foraminifers that allow correlation with the North Atlantic and the adjacent Pigafetta Basin. Assemblages of DendrophryalRhizammina in graded beds within the zeolitic claystone indicate reworking through entrainment in the flocculent E layer of turbidites, rather than recolonization following a biosiliceous event. Background sedimentation of the claystone took place below the carbonate compensation depth. The nannofossil chalk contains reworked lower bathyal to abyssal calcareous foraminifers of late Paleocene to early Miocene age. The topmost bed of the nannofossil chalk unit commences with an algal foraminiferal packstone containing Lepidocyclina sumatrensis, Heterostegina borneensis, Amphistegina hauerina, Asterigerina marshallana, and A. tentoria, which indicate that the source area was a shallow-water reef and allow the bed to be dated as early Miocene. The absence of obviously younger planktonic microfossils in the graded bed indicates that the resedimentation event was generally contemporaneous with original deposition and took place during an early Miocene global sea-level highstand. An early Miocene shallow-water assemblage is also seen in the graded beds at the base of a volcaniclastic turbidite sequence overlying the nannofossil chalks. Resedimentation of this unit was associated with volcanic activity some distance away. |
| title | (Table 1) Distribution of Cretaceous-Tertiary benthic foraminifers in ODP Hole 129-802A |
| topic | 129-802A; Amphistegina hauerina; Angulogerina angulosa; Aragonia ouezzanensis; Aragonia velascoensis; Asterigerina marshallana; Asterigerina tentoria; Bolivina sp.; Bolivina spp.; Bulimina tuxpamensis; Cassidulina subtumida; Cibicides ribbingi; Cibicides spp.; Cibicidoides voltzianus; Counting >63 µm fraction; Dendrophyra latissima; Dentalina spp.; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Epistomina caracolla; Gaudryina pyramidata; Globorotalites michelinianus; Glomospira charoides; Gyroidinoides beisseli; Gyroidinoides cf. praeglobosus; Haplophragmoides biumbilicalis; Haplophragmoides herbichi; Haplophragmoides spp.; Heterostegina borneensis; Hormosina crassa; Hormosina ovulum; Hyperammina dilatata; Joides Resolution; Leg129; Lenticulina sp.; Lenticulina spp.; Lepidocyclina sumatrensis; Loxostomum eleyi; North Pacific Ocean; Number of species; Ocean Drilling Program; ODP; Oridorsalis umbonatus; Orthomorphina aff. antillea; Orthomorphina cf. columnaris; Pararotalia armata; Paratrochamminoides corpulentus; Paratrochamminoides intricatus; Planulina cf. wuellerstorfi; Plectorecurvoides rotundus; Pleurostomella cf. alternans; Praebulimina cushmani; Praecystammina globigerinaeformis; Pullenia minuta; Reussella cf. pseudospinulosa; Rhizammina sp.; Rotalia tectoria; Saccammina sphaerica; Sample code/label; Siphonina cf. tenuicarinata; Stilostomella lepidula; Stilostomella pseudoscripta; Stilostomella sp.; Subreophax scalaris; Trochammina depressa |
| url | https://doi.org/10.1594/PANGAEA.770684 |