Work

Geology of the area where debris flows occurred by a heavy rainfall in Hiroshima at August 20, 2014

Year: 2015

Type: article

Abstract: A new geological map has been prepared of an area in Hiroshima where numerous debris flows occurred on account of heavy rainfall on 20 August 2014. Rocks in the area are mainly the Late Cretaceous Hiroshima Granites and its roof pendant, which consists of the Late Cretaceous Takada Rhyolites, a Jurassic accretionary complex correlative of the Kuga Group, and schists correlative of the Triassic-Jurassic Suo metamorphic rocks. All these rocks have been intruded by porphyritic rhyolite dikes. The most disastrous debris flows were due to the collapse of steep slopes composed of the porphyritic rhyolite dikes. Many other disastrous debris flows occurred because of small collapses of steep slopes along the ridge lines composed of schist that had experienced contact metamorphism, and also of porphyritic granite.

Source: The Journal of the Geological Society of Japan

DOI: 10.5575/geosoc.2015.0022

Authors: Makoto Saito, Daisaku Kawabata, Daisuke Sato, Shoji Doshida, Kiminori Araiba

Institutions: Geological Survey of Japan, National Research Institute of Fire and Disaster

Language: English

Topic: Landslides and related hazards

Subfield: Management, Monitoring, Policy and Law

Field: Environmental Science

Domain: Physical Sciences

Open Access status: bronze

OpenAlex ID: W4231472463

FWCI: 0.616

Cites:

Cited by: 5

Related to: 10