Pollen analysis of ODP Hole 202-1239A
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2020
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| _version_ | 1867169140732592128 |
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| author | Grimmer, Friederike Dupont, Lydie M |
| author_facet | Grimmer, Friederike Dupont, Lydie M |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Vegetation and climate change in western equatorial South America were studied using palynological analysis. We studied 88 marine sediment samples from ODP Site 1239 dated between 3.9 and 2.7 Ma. The presented pollen record represents the regional vegetation from the coastal lowlands to the high montane Páramo in the western Andean Cordillera. A trend towards more open vegetation is observed. The climate changes towards cooler conditions, which is manifested by a lowering of the forest line from 3.3 Ma on. An increase of Amaranthaceae pollen after 3.1 Ma suggests drier conditions along the coast. The isochronous occurrence of environmental changes in the presented record, that is, cooling and coastal drying, with the first major pulse of ice‐rafted debris and cooling temperatures in the Northern Hemisphere suggests that these changes might have been a precursor of the intensification of the Northern Hemisphere glaciation. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_921208 |
| institution | PANGAEA |
| language | en |
| publishDate | 2020 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Pollen analysis of ODP Hole 202-1239A Grimmer, Friederike Dupont, Lydie M 202-1239A; AGE; Alchornea; Amaranthaceae; Ambrosia/Xanthium; Analyst; Anemia-type; Apocynaceae; Artemisia; Asteraceae Liguliflorae; Asteraceae Tubuliflorae; Bocconia-type; Caryophyllaceae; Clethra; Cyatheaceae; Cyperaceae; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Elaphoglossum; Ericaceae; Grammitis; Hedyosmum; Huperzia; Hymenophyllum; Ilex; Jamesonia/Eriosorus; Joides Resolution; Leg202; Lophosoria quadripinnata; Lycopodium; Malvaceae; Marker, added; Marker, found; Monolete psilate; Morella; Myrtaceae; Ocean Drilling Program; ODP; Orthrosanthus; Pityrogramma; Poaceae; Podocarpaceae; Pollen indeterminata; Polylepis/Acaena; Polypodiaceae; Pteris grandifolia; Puya; Rosaceae; Saccoloma elegans; Sample code/label; Selaginella; Sisyrinchium; South Pacific Ocean; Styloceras-type; Sum; Trilete psilate; Urticaceae/Moraceae; Vernonia; Volume Vegetation and climate change in western equatorial South America were studied using palynological analysis. We studied 88 marine sediment samples from ODP Site 1239 dated between 3.9 and 2.7 Ma. The presented pollen record represents the regional vegetation from the coastal lowlands to the high montane Páramo in the western Andean Cordillera. A trend towards more open vegetation is observed. The climate changes towards cooler conditions, which is manifested by a lowering of the forest line from 3.3 Ma on. An increase of Amaranthaceae pollen after 3.1 Ma suggests drier conditions along the coast. The isochronous occurrence of environmental changes in the presented record, that is, cooling and coastal drying, with the first major pulse of ice‐rafted debris and cooling temperatures in the Northern Hemisphere suggests that these changes might have been a precursor of the intensification of the Northern Hemisphere glaciation. |
| title | Pollen analysis of ODP Hole 202-1239A |
| topic | 202-1239A; AGE; Alchornea; Amaranthaceae; Ambrosia/Xanthium; Analyst; Anemia-type; Apocynaceae; Artemisia; Asteraceae Liguliflorae; Asteraceae Tubuliflorae; Bocconia-type; Caryophyllaceae; Clethra; Cyatheaceae; Cyperaceae; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Elaphoglossum; Ericaceae; Grammitis; Hedyosmum; Huperzia; Hymenophyllum; Ilex; Jamesonia/Eriosorus; Joides Resolution; Leg202; Lophosoria quadripinnata; Lycopodium; Malvaceae; Marker, added; Marker, found; Monolete psilate; Morella; Myrtaceae; Ocean Drilling Program; ODP; Orthrosanthus; Pityrogramma; Poaceae; Podocarpaceae; Pollen indeterminata; Polylepis/Acaena; Polypodiaceae; Pteris grandifolia; Puya; Rosaceae; Saccoloma elegans; Sample code/label; Selaginella; Sisyrinchium; South Pacific Ocean; Styloceras-type; Sum; Trilete psilate; Urticaceae/Moraceae; Vernonia; Volume |
| url | https://doi.org/10.1594/PANGAEA.921208 |