Laccolith (Petrology 💎)

A laccolith is a body of intrusive rock with a dome-shaped upper surface and a level base, fed by a conduit from below. A laccolith forms when magma rising through the Earth's crust begins to spread out horizontally, prying apart the host rock strata. The pressure of the magma is high enough that the overlying strata are forced upward, giving the l...

https://en.wikipedia.org/wiki/Laccolith

#Laccolith #Petrology #Laccoliths #IgneousRocks #GeologicDomes #SheetIntrusions

Palsa (Geomorphology 🏞️)

Palsas are peat mounds with a permanently frozen peat and mineral soil core. They are a typical phenomenon in the polar and subpolar zone of discontinuous permafrost. One of their characteristics is having steep slopes that rise above the mire surface. This leads to the accumulation of large amounts of snow around them. The summits of the palsas are free o...

https://en.wikipedia.org/wiki/Palsa

#Palsa #Palsas #Glaciology #GeologicDomes #Geomorphology #PatternedGrounds