Writers : Sajadi,Fereshte;Hadadtavakoli,Elham
Refference : The 23th Symposium on Geosciences;Tehran
Publishing Year : 1383

Abstract :

The Kashafrud Formation is well exposed in Ghale Sangi Section that is located in the east of Mashhad. In the study section the Kashafrud Formation overlies with a coarse basal conglomerate and a strong angular unconformity Sina Formation and it is disconformably overlain by limestone of Mozduran Formation. Moderately diverse and reasonably well-preserved palynoflora dominated by miospores, dinoflagellates and fungal spores associated with foraminiferal test lining occur in Ghale Sangi Section. Of the miospores assemblage Klukisporites, Dictyophyllidites and Cyathidites are particularly abundant and occurence of Contignisporites and Striatella indicate (Bajocian-Bathonian) age for the studied section which corroborates the faunal (ammonites contents) testimony. Inferred natural relationship of the spores and pollen grains imply derivation from a diverse parental flora (e. g. Pterophyta, Brayophyta, Cycadophyta, Ginkgophyta, Coniferophyta). The occurence of relatively abundant Pterophyta (Ferns) with the fungal spores implies sedimentation in a wet tropical and subtropical condition during the Middle Jurassic. Based on the palynology evidences the association of proximate dinoflagellates with spores and pollen collectively indicate an open marine, near shore depositional setting for the Kashafrud Formation.

Subject List : Plants-fossil