島根半島中央地區の層序と構造(續) : 島根半島第三系の地質學的研究(其の2)

概要

論文の詳細を見る
In the present paper, the following facts are described in detail, continued from the preceding paper., (1) In the area occur the Koura sandstone member of the lowest formation and the middle formation, the Furue formation, of the Shinji group., The Furue formation consists of three members, the Josoji shale, the Ushikiri alternation and the Furue mudstone., The relations of these members are conformab1e, except for the relation between the Josoji shale member and the Ushikiri alternation member, which are in contact with each other by a fault., In these members are found a few plant leaves and several smaller foraminifers, such as Dryophyllum dewalquer ? SAP., Salix Sp., etc., from the Koura sandstone member, Cyclammina, cf., cancellata BRADY from the Josoji shale member and Martinottiella, communis (d'ORBIGNY), Cyclammina incisa (STACHE), C., japonica, ASANO, etc., from the Furue mudstone member., The detailed study of smaller foraminifers is now in progress by the writer., (2) As described in the preceding paper, the eastern area is characterized by "positive" structural forms, such as anticlines and domes., In contrast with the eastern area, the present area is characterized by "negative" structural forms, such as synclines and basins, which are related to the hinge faults, extending nearly E-W.,
日本地質学会の論文
1953-03-25