Assertion: magma | /r/HasProperty | viscous
Facets:
value: very
type: DEGREE
value: because of its high silica content
type: CAUSE
Source sentences:
text: The volcanoes form steep cones, rather than rounded shapes, because the magma is viscous.
text: This magma tends to be extremely viscous because of its high silica content, so it often does not attain the surface but cools and solidifies at depth.
text: Volcanoes with rhyolitic magma commonly erupt explosively, and rhyolitic lava flows are typically of limited extent and have steep margins because the magma is so viscous.
text: If crystal settling does not take place, because the magma is too viscous, then the process of cooling will continue as predicted by the Bowen reaction series.
text: This magma is so viscous that sizable mineral crystals cannot grow before chilling of the magma "freezes" crystal development.
text: A magma with high silica (>60%) will be quite viscous
text: Volcanoes related to converging plate margins (see the section Volcanism and tectonic activity) generally have a high gas content, and their magma is very viscous.