One difference between wide & narrow craters is the presence of this to mix with magma & cause big steam explosions
The wide body and narrow neck of a soda bottle roughly resemble 
the shape of a ... Shaking the bottle adds energy and causes gas in the soda 
water to... [DOC] [TLE] Volcanology and Geothermal Energy [PAR] One of the most complex problems we have studied is how hydrothermal ...