Assertion: magma's temperature | /r/CapableOf | increase by 25°c
Facets:
value: for every 1km depth
type: OTHER
value: generally
type: MANNER
Source sentences:
text: The temperature of the Earth's crust generally increases by 25°C for every 1km depth ; for geothermal to be economical that value must be nearer 50 or even 150°C/km.