炭田の堆積学的研究(その1)タ張炭田平和付近における夕張層内の堆積小輪廻について

概要

論文の詳細を見る
The Yubari, which is an important coal-bearing formation extensively developed in the Ishikari coal-field, has been hitherto regarded as comprising one continuous sequence of sediments from base to top., Detailed observations in the field as well as by careful examinations of the correlated boring logs from the Heiwa Area, shows that it is not a single, continuous deposit, but that it is composed of six successive subformations, each separated by diastems., The six subformations are represented by six cyclothems, each of which commences with conglomeratic beds, thus indicating a pause in sedimentation and erosion of the sediments of the preceding cyclothems.,
日本地質学会の論文
1954-10-25