کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4682151 1635146 2015 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mid-Late Devonian assemblages of herbaceous lycophytes from northern Argentina and Bolivia: Age assessment with palynomorphs and invertebrates and paleobiogeographic importance
ترجمه فارسی عنوان
ارقام دونانی میان دوره ای از لیکوفیت های گیاهی از شمال آرژانتین و بولیوی: ارزیابی سن با پالینومورف ها و بی مهرگان و اهمیت پالیبوبیوگرافی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی


• A new collection of Haplostigma Seward from southern Bolivia and northern Argentina is presented.
• The range of Haplostigma records is Eifelian-earliest Famennian by means of palynology.
• Palynology and invertebrates were used to correlate the outcrops with Haplostigma.
• Terrestrial connections between the local areas and others in South America are here supported.
• The Eifelian – Givetian Afrosouthamerican Subrealm is here extended up to the early Famennian.

Implications of a new collection of lycophytes of the genera Haplostigma Seward and Paleostigma Kräusel and Dolianiti from southern Bolivia and northern Argentina are presented. Fragmented herbaceous stems of lycophytes preserved as compressions, impressions and casts come from the Middle and Late Devonian Pescado (Huamampampa), Los Monos and Iquiri formations at Mataral, Yesera, Angosto del Pescado and Balapuca. The interbedded shales and siltstones bearing the lycophytes were also examined for palynology. They yielded mostly terrestrial palynomorphs with Grandispora pseudoreticulata and other Eifelian to Givetian species and fewer microplanktonic species (i.e., acritarchs, prasinophytes, chitinozoans). At Yesera, diagnostic spores and elements of the microplankton suggest a Givetian-Frasnian up to early Famennian age for the Haplostigma beds. Moreover, presence of the same brachiopod taxon in the Haplostigma intervals at Yesera Dique (palynologically barren) and Yesera Centro supports their correlation. This new information supports terrestrial connections between these Bolivian and Argentine areas and other regions of South America in the Eifelian – Givetian Afrosouthamerican Subrealm, which extended up to the early Famennian.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of South American Earth Sciences - Volume 63, November 2015, Pages 70–83
نویسندگان
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