پیوندهای مفید
اخبار و اعلانات
آمار
| تعداد نشریات | 162 |
| تعداد شماره‌ها | 6,677 |
| تعداد مقالات | 71,947 |
| تعداد مشاهده مقاله | 128,721,083 |
| تعداد دریافت فایل اصل مقاله | 101,550,150 |
Planktonic Foraminifera Response to Sudden Global Warming in Late Maastrichtian, a Case Study from Ziyarat-Kola, Central Alborz, Iran | ||
| Journal of Sciences, Islamic Republic of Iran | ||
| مقاله 5، دوره 20، شماره 3، آذر 2009 اصل مقاله (495.25 K) | ||
| نویسنده | ||
| M. Asgharian Rostami | ||
| چکیده | ||
| An abrupt global warming event has been recorded in many parts of the world in sediments of Latest Maastrichtian age between 65.45-65.10 Ma. This warm event was documented here at a section near Ziyarat-kola in Central Alborz based on analysis of planktonic foraminifera. An unusual abundance of normally large-size species such as Globotruncana arca, Globigerinelloides subcarinatus, Pseudoguembelina hariaensis and Rugoglobigerina rugosa in small-size fraction (63-150) was recorded. A similar trend of increasing in relative abundance of some opportunist species such as Guembelitria spp. was also recorded. At the same time, Laeviheterohelix dentata a long ranging dominant species, decreases considerably reflecting a high stress environmental condition as warming. Palynological studies show an increase in fungal spore and in thermophilic species confirming the result gained from foraminiferal analysis. | ||
| کلیدواژه‌ها | ||
| Central Alborz؛ Global warming؛ Iran؛ Late Maastrichtian؛ Planktonic Foraminifera | ||
|
آمار تعداد مشاهده مقاله: 1,507 تعداد دریافت فایل اصل مقاله: 2,126 |
||
سامانه مدیریت نشریات علمی. قدرت گرفته از سیناوب