کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
4750179 1642480 2015 13 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Ammonoid-calibrated sporomorph assemblages reflect a shift from hygrophytic to xerophytic elements in the late Anisian (Middle Triassic) of the Southern Alps (Italy)
ترجمه فارسی عنوان
مجموعه های اسپورمورف کالیبراسیون آمونوئید منعکس کننده تغییرات از عناصر هورفیتی به عناصر کورفوییت در اواخر انیسیان (ترایاس میانی) آلپ جنوبی (ایتالیا)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فسیل شناسی
چکیده انگلیسی


• Palynological analyses in the late Anisian of the Southern Alps (Italy)
• Sporomorph biozonation is defined and calibrated with ammonoid biostratigraphy.
• A shift from markedly hygrophytic to xerophytic flora is detected.
• This shift is recorded also in other coeval locations in the NW-Tethys.
• The shift precedes a similar change recorded in the Boreal realm.

An integrated sporomorph and ammonoid biostratigraphy has been carried out in three upper Anisian (Middle Triassic) stratigraphic sections in the Southern Alps (Italy). Two main sporomorph assemblages have been defined and calibrated with ammonoids. The TrSM-A assemblage is marked by the co-occurrence of Stellapollenites thiergartii, Dyupetalum vicentinense, Cristianisporites triangulatus and Staropollenites antonescui. The TrSM-B assemblage is marked by the first occurrence of Cannanoropollis scheuringii. The boundary between the TrSM-A and TrSM-B assemblages falls in the upper part of the reitzi ammonoid subzone (Hungarites zone; Illyrian). The TrSM-A and TrSM-B assemblages have been compared and correlated with other existing sporomorph biozonations for the northwestern Tethys, the Germanic Basin and the Barents Sea.The first occurrence of the genus Ovalipollis is recorded within the assemblage TrSM-A, in the lower–middle reitzi ammonoid subzone.Quantitative palynological data coupled with previously published studies show a shift from hygrophytic to xerophytic elements in the trinodosus–lower reitzi ammonoid subzones. This change in precipitation range can be recognised in other sections in the northwestern Tethys but seems to have preceded a similar shift recorded in the Boreal realm.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Review of Palaeobotany and Palynology - Volume 218, July 2015, Pages 15–27
نویسندگان
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