| DOI: | 10.1016/j.palaeo.2015.06.046
|
| 论文题名: | The Cretaceous/Paleogene boundary: Foraminifera, sea grasses, sea level change and sequence stratigraphy |
| 作者: | Hart M.B.; FitzPatrick M.E.J.; Smart C.W.
|
| 刊名: | Palaeogeography, Palaeoclimatology, Palaeoecology
|
| ISSN: | 0031-0182
|
| 出版年: | 2016
|
| 卷: | 441 | | 起始页码: | 420
|
| 结束页码: | 429
|
| 语种: | 英语
|
| 英文关键词: | Brazos River
; Foraminifera
; Maastricht
; Sea grass
; Sea level change
; Stevns Klint
|
| 英文摘要: | The tsunami generated by the Chicxulub impact eroded the uppermost Cretaceous surface of the Gulf Coast region (U.S.A.) forming a distinctive topography that was previously interpreted as a sequence boundary. At more distal sites, such as Stevns Klint (Denmark), there appears to be no sequence boundary at the Cretaceous/Paleogene boundary but there is one within the uppermost Maastrichtian, between the Sigerslev and Højerup members, and another in the lowermost Paleocene (top of Zone P1a). Both of these surfaces are identified by distinctive, phosphatized, and incipient hardgrounds. The changes in sea level involved in the generation of uppermost Cretaceous sequences are thought to have been minimal as, in the Gulpen and Maastricht formations of the Maastricht area (Netherlands), the presence of sea grasses and their associated foraminifera would indicate that the chalk sea floor remained within the range of water depth that would allow photosynthesis (< 20 m), even across the postulated sequence boundaries. The assemblages of foraminifera associated with sea grasses in the uppermost Maastrichtian are comparable in morphology with those associated with modern sea grass meadows and indicate a relationship that may have existed since, at least, the latest Cretaceous. © 2015 Elsevier B.V. |
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/68692
|
| Appears in Collections: | 过去全球变化的重建
|
|
There are no files associated with this item.
|
|
作者单位: | School of Geography, Earth & Environmental Sciences, Plymouth University, Drake Circus, Plymouth, United Kingdom
|
| Recommended Citation: | |
Hart M.B.,FitzPatrick M.E.J.,Smart C.W.. The Cretaceous/Paleogene boundary: Foraminifera, sea grasses, sea level change and sequence stratigraphy[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,441
|
|
|