کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9535272 | 1356592 | 2005 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fossil struthionid eggshells from Laetoli, Tanzania: Taxonomic and biostratigraphic significance
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Fossil struthionid eggshells from Laetoli, Tanzania: Taxonomic and biostratigraphic significance Fossil struthionid eggshells from Laetoli, Tanzania: Taxonomic and biostratigraphic significance](/preview/png/9535272.png)
چکیده انگلیسی
At about 6.5Â Ma, Diamantornis and elephant birds were replaced in East Africa by ostriches belonging to the genus Struthio. Three time-successive species of ostriches are identified in the fossil record of East Africa, beginning with Struthio. cf. karingarabensis (â¼6.5-4.2Â Ma), followed by S. kakesiensis (â¼4.5-3.6Â Ma) and then S. camelus (â¼3.8Â Ma onwards). A similar sequence of taxa has previously been recorded from localities in Namibia, but at these sites there is no possibility to precisely calibrate the ages of the different species using radiometric dating. Nevertheless, the broadly similar evolutionary sequence and the close correspondence in inferred ages for the succession of species in East Africa and Namibia suggest that ostrich eggshells are a very useful tool for biochronological correlation of paleontological sites in sub-Saharan Africa.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of African Earth Sciences - Volume 41, Issue 4, April 2005, Pages 303-315
Journal: Journal of African Earth Sciences - Volume 41, Issue 4, April 2005, Pages 303-315
نویسندگان
Terry Harrison, Charles P. Msuya,