摘要
根据深圳福田区12个钻孔资料,将本区晚更新世一全新世地层划分为三个孢粉组合带:Ⅰ带,>31950±710—6790±130aB.P.,植被以草本植物为主;Ⅱ带,6790±130—2150士50aB.P,植被以热带和亚热带常缘阔叶乔木占优势;Ⅲ带,2150±50aB.P.以来,植被以热带和亚热带蕨类植物占优势.在此基础上根据所含生物化石资料,进一步探讨了该区晚更新世以来海陆变迁,确定从7000a前开始,本区曾遭受过一次海侵,海侵范围不大,海水从东南方向侵入.
According to the data of drilling, sporo-pollen, 14C dating and sedimentary characteristics, late Pleistocene-Holocene strata in Futian area can be divided into three zones of sporo-pollen assemblages:
Zone I, 31950 710-6790 130 a. B. P., the vegetation is dominated by herbs, indicating cool and dry climates.
Zone II, 6790 130-2150 50 a. B. P., the vegetation is dominated by tropil cal and subtropical evergreen broad-leaved trees, and avicennielums appear in coastal area, reflecting a hot and humid climate.
Zone III, 2150 50 a. B. P. till now, the vegetation is dominated by tropica-and subtropical pteridophytas, representing a warm and humid climate.
A transgression has been proved to happen in this area about 7000 years ago and continue to the present. The transgression does not cover a large area and it comes into the area from southeast direction.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
1989年第1期93-101,共9页
Marine Geology & Quaternary Geology
