TY - JOUR AU1 - Marcoux, Jean AU2 - Girardeau, Jacques AU3 - Fourcade, Eric AU4 - Bassoullet, Jean-Paul AU5 - Philip, Jean AU6 - Jaffrezo, Michel AU7 - Xuchang, Xiao AU8 - Chengfa, Chang AB - Abstract— The Lhasa Block (s.l.) is bounded to the South by the Tertiary Yarlung Zangbo suture zone and to the North by the terminal Jurassic/earliest Cretaceous Bangong Nu Jiang suture zone. Several tectonostratigraphic units have been recognized in the central-northern part of the Lhasa Block. These are from bottom to top : 1) a thick turbiditic series with a few lenses of allodapic limestones which have yielded an Aalenian — Bajocian foraminiferal assemblage. This series is tectonieally overlain by the Donqiao ophiolite; 2) the continental to shallow marine late Malm to lowermost Cretaceous Zigetang Formation which disconformably overlies the Donqiao ophiolite and 3) continental red detrital rocks or marine Early/Late Aptian boundary to Early Albian foraminifera-rich bedded limestones in which some volcanic rocks are locally interbedded.We discuss the palaeogeographical distribution and biostratigraphical meaning of some foraminifera (Gutnicella cayeuxi (LUCAS), Palorbitolina fen<ícu/o™(Bl .LMKNBACIl), Praeorbitolina cormyi SCHROEDER and Palor-bilolmoides hedini CHREREHI and ScilKOKDK.lt) and their bearing on the radiometric age of the Aptian-Albian boundary. TI - Geology and biostratigraphy of the Jurassic and lower cretaceous series to the north of the Lhasa Block (Tibet, China) JF - Geodinamica Acta DO - 10.1080/09853111.1987.11105148 DA - 1987-01-01 UR - https://www.deepdyve.com/lp/taylor-francis/geology-and-biostratigraphy-of-the-jurassic-and-lower-cretaceous-kMS5YzHnHb SP - 313 EP - 325 VL - 1 IS - 4-5 DP - DeepDyve ER -