| _version_ | 1867168111167275008 |
|---|---|
| author | Ehrmann, Lisa M Keigwin, Lloyd D |
| author_facet | Ehrmann, Lisa M Keigwin, Lloyd D |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | A "total fauna" curve (Ruddiman, 1971; doi:10.1130/0016-7606(1971)82[283:PSITEA]2.0.CO;2) shows that surface water overlying DSDP Site 606 (central North Atlantic Ocean) cooled suddenly at 3.1 Ma, within the Mammoth paleomagnetic reversed interval. At that time, Globorotalia puncticulata, Neogloboquadrina pachyderma, and Globorotalia crassaformis increased and Globorotalia hirsuta, Globigerinoides sacculifer, and Sphaeroidinellopsis decreased in abundance. Oxygen isotope results for Globigerina bulloides do not indicate a "stepwise" cooling, but probably reflect small changes in continental ice volume. It is hypothesized that as annual average temperatures decreased, G. bulloides delayed its bloom from spring to summer to follow a preferred temperature habitat. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_788610 |
| institution | PANGAEA |
| language | en |
| publishDate | 1987 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Planktonic foraminiferal abundance at DSDP Site 94-606 Ehrmann, Lisa M Keigwin, Lloyd D 94-606_Site; COMPCORE; Composite Core; Counting >180 µm fraction; Deep Sea Drilling Project; DEPTH, sediment/rock; DSDP; Foraminifera, benthic/planktic ratio; Foraminifera, planktic; Foraminifera, planktic indeterminata; Fragmentation index, planktic foraminifera; Globigerina bulloides; Globigerina falconensis; Globigerina woodi; Globigerinella aequilateralis; Globigerinita glutinata; Globigerinoides cf. ruber; Globigerinoides obliquus; Globigerinoides sacculifer; Globoquadrina altispira; Globorotalia crassaformis; Globorotalia hirsuta; Globorotalia menardii; Globorotalia puncticulata; Globorotalia scitula; Glomar Challenger; Leg94; Neogloboquadrina acostaensis; Neogloboquadrina pachyderma; North Atlantic/FLANK; Orbulina sp.; Sphaeroidinellopsis spp. A "total fauna" curve (Ruddiman, 1971; doi:10.1130/0016-7606(1971)82[283:PSITEA]2.0.CO;2) shows that surface water overlying DSDP Site 606 (central North Atlantic Ocean) cooled suddenly at 3.1 Ma, within the Mammoth paleomagnetic reversed interval. At that time, Globorotalia puncticulata, Neogloboquadrina pachyderma, and Globorotalia crassaformis increased and Globorotalia hirsuta, Globigerinoides sacculifer, and Sphaeroidinellopsis decreased in abundance. Oxygen isotope results for Globigerina bulloides do not indicate a "stepwise" cooling, but probably reflect small changes in continental ice volume. It is hypothesized that as annual average temperatures decreased, G. bulloides delayed its bloom from spring to summer to follow a preferred temperature habitat. |
| title | (Table 1) Planktonic foraminiferal abundance at DSDP Site 94-606 |
| topic | 94-606_Site; COMPCORE; Composite Core; Counting >180 µm fraction; Deep Sea Drilling Project; DEPTH, sediment/rock; DSDP; Foraminifera, benthic/planktic ratio; Foraminifera, planktic; Foraminifera, planktic indeterminata; Fragmentation index, planktic foraminifera; Globigerina bulloides; Globigerina falconensis; Globigerina woodi; Globigerinella aequilateralis; Globigerinita glutinata; Globigerinoides cf. ruber; Globigerinoides obliquus; Globigerinoides sacculifer; Globoquadrina altispira; Globorotalia crassaformis; Globorotalia hirsuta; Globorotalia menardii; Globorotalia puncticulata; Globorotalia scitula; Glomar Challenger; Leg94; Neogloboquadrina acostaensis; Neogloboquadrina pachyderma; North Atlantic/FLANK; Orbulina sp.; Sphaeroidinellopsis spp. |
| url | https://doi.org/10.1594/PANGAEA.788610 |