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- W2372247903 abstract "Palynological fossils found in the Shahezi Formation in Changwu area are the most abundant of the same horizon in the north part of the Songliao Basin. It can be divided into two palynological assemblages in the study area from bottom to top: (1)ClassopollisPiceites Ass. and (2)LophotriletesCicatricosisporites Ass. The first palynological assemblage was characterized by high percentage gymnosperm pollens (71.3%~85.7%) which was mainly composed of Classopollis annulatus, Inaperturopollenites sp., Piceites sp., Piceaepollenites sp., Pinuspollenites sp., etc., abundant fern spores (14.3%~28.3%) which included Cyathidites minor (0%~8.0%), Granulatisporites sp.(0%~8.0%), Osmundacidites welmnnii(4.0%~7.2%), Cicatricosisporites australiensis (0.8%~4.0%), etc. and no angiosperms. The second was characterized by high percentage fern spores (83.8%~85.0%) which was mainly composed of Granulatisporites sp.(8.3%~25.2%), Lophotriletes sp.(13.3%~25.2%), Cicatricosisporites australiensis(1.8%~28.4%), Cyathidites minor (3.3%~15.3%), Converrucosisporites sp.(0%~12.6%), etc., abundant gymnosperm pollens (15.0%~16.2%) which included Classopollis annulatus(0.9%~1.7%), Exesipollenites sp.(0%~3.3%), Paleoconiferus sp.(0%~2.7%), etc. and no angiosperms. The character of the two assemblages is very clear and can be used to divide the strata. The age of the Shahezi Formation should be Early Cretaceous Valanginian-Hauterivian according to the palynological data. Some part might be of Barremian in age, although no angiosperm pollens have been found." @default.
- W2372247903 created "2016-06-24" @default.
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- W2372247903 date "2003-01-01" @default.
- W2372247903 modified "2023-09-28" @default.
- W2372247903 title "PALYNOLOGICAL ASSEMBLAGES OF THE SHAHEZI FORMATION IN CHANGWU AREA, NORTH OF SONGLIAO BASIN" @default.
- W2372247903 hasPublicationYear "2003" @default.
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