2007-06-07 03:46:56 · 7 answers · asked by cinnamonscentedbear 3 in Science & Mathematics ➔ Earth Sciences & Geology
Cracks in the Earth that contain lava are called fissures; I think otherwise they are just crevices.
2007-06-07 04:10:37 · answer #1 · answered by rdnck_grl_ms_007 3 · 0⤊ 1⤋
Try the following search strings:
earth crack -earthquake
(the -earthquake signifies that you want sites that don't feature anything about earthquakes)
earth fissure -earthquake
A couple of sites to get your friend going:
http://www.firstcoastnews.com/news/usworld/news-article.aspx?storyid=39373
http://science.enotes.com/earth-science/fissure
Hope this helps.
2007-06-07 11:11:20 · answer #2 · answered by rhapword 6 · 0⤊ 1⤋
subsidence (from declining groundwater or collapsing mines) can also cause fissures to appear on the surface, as well as the previously mentioned potential causes.
2007-06-07 14:43:22 · answer #3 · answered by outcrop 5 · 0⤊ 0⤋
Try looking up "mud cracks". These are created by dessication of mud.
2007-06-07 11:58:54 · answer #4 · answered by Lady Geologist 7 · 0⤊ 0⤋
well. tectonic plates move all the time and open up cracks in the earths surface. it is either that or erosion
2007-06-07 11:33:51 · answer #5 · answered by maggie 3 · 0⤊ 0⤋
Could be dessication phenomena related to evaporation and shrinkage of clays.
2007-06-07 11:15:23 · answer #6 · answered by MrNeutral 6 · 1⤊ 1⤋
And your question is what?
Is he looking for cracks in dried mud or slot canyons?
2007-06-07 11:00:59 · answer #7 · answered by dogsafire 7 · 0⤊ 1⤋