Tectonic geomorphology and evidence for active tilting of the Bela, Khadir and Bhanjada islands in the seismically active Kachchh palaeorift graben, Western India

Auteur(s) et Affiliation(s)



Description :
The Bela, Khadir and Bhanjada islands form a part of a linear chain of four major islands bound by the E-W trending Island Belt Fault (IBF) in the northern part of the seismically active Kachchh palaeorift basin. The islands are discrete tilt blocks comprising south dipping Mesozoic and Neogene rocks. The islands abruptly rise above the rann surface which is a flat salt encrusted surface representing the floor of the Holocene sea. The major geomorphic components of the Bela, Khadir and Bhanjada islands studied are the north facing escarpment forming the northern margins of the islands, south sloping tectonically controlled backslopes, raised intertidal flats, notches and other marine erosional features attributed to the palaeo-sea that occupied the rann surface until ∼2 ka. The presence of raised marine depositional and erosional features at the base of the escarpments point to mid-late Holocene uplift of the islands in a tilted manner due to tectonic activity along the IBF.


Type de document :
Article de périodique

Source :
Zeitschrift für Geomorphologie, issn : 0372-8854, 2010, vol. 54, n°. 4, p. 467-490, nombre de pages : 24, Références bibliographiques : 17 ref.

Date :
2010

Editeur :
Pays édition : Allemagne, Stuttgart, Gebruder Borntraeger