In:
Terra Nova, Wiley, Vol. 18, No. 1 ( 2006-02), p. 26-33
Abstract:
Large volcanic edifices are often shaped by the coalescence of adjacent volcanoes as well as intrusive rift zones and gravitational spreading. To better understand the structure of such volcanoes we designed analogue experiments simulating gravitational spreading of an edifice made by overlapping cones of different age, and examined the formation of rift zones. The results allow distinction of two main rift geometries. (i) Spreading edifices of similar age that partly overlap, tend to develop a rift zone approximately perpendicular to the boundary of both volcanoes. Such a rift zone causes two volcanoes to grow together and form an elongated topographic ridge. (ii) Partly overlapping volcanoes of different age are spreading at different rates and thus form a rift zone parallel to the boundary of both volcanoes. Such a rift zone causes two volcanoes to structurally separate. The results are widely applicable for large volcanoes subject to rifting and flank spreading, which we demonstrate for Réunion Island and for southern Hawaii.
Type of Medium:
Online Resource
ISSN:
0954-4879
,
1365-3121
DOI:
10.1111/ter.2006.18.issue-1
DOI:
10.1111/j.1365-3121.2005.00656.x
Language:
English
Publisher:
Wiley
Publication Date:
2006
detail.hit.zdb_id:
1000080-X
detail.hit.zdb_id:
2020958-7
SSG:
13
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