鄂东南早白垩世灵乡群孢粉组合

本文根据从大冶灵乡-陈重山剖面的中部、灵乡狮子山东侧采坑和鄂城太和1孔的相当层位中所获得的孢粉组合(共67属120余种,其中新种9个,新联合2个),认为灵乡群孢粉组合属于 Classopollis、Psophosphaera-Cicatricosisporites、Schizaeoisporites-没有或极个别的出现被子植物花粉的组合类型,其地质时代应为早白垩世早期-中期(凡兰吟期-巴列姆期)。并推测鄂东南地区当时的气候属于偏干旱的热带-亚热带型。

EARLY CRETACEOUS SPORO-POLLEN ASSEMBLAGE FROM LINGXIANG GROUP IN SOUTHEASTERN HUBEI

The Lingxiang Group is of a volcano-sedimentary rock series,which is situated between Lower volcanic and Upper volccanic Formations in southeastern Hu- bei.Its geological age is not ascertained either beloning to Late Jurassic or Early Cre- taceous period.The rich fossils spores and pollen described in this paper is found in the greyish-black shale from the middle part of this group,including about 120 species of spores and pollen grains assigned to 67 genera.9 new species and 2 combinations among them are described,namely,Impardecispora rara,Neoraistrickia dehiscenta,Api- culatisporis taiheensis,Baculatisporites yangziensis,Reticulatisporites hubeiensis,Cop- tospora lingxiangensis,C.laevigataeformis,Araucariacites grenulatus,Callialasporites shizishanensis and Araucariacites limbatus(Balme),Inaperturopollenites minor(Mal.).