petrified
petrified
frozen fossil
It is called a mold fossil.
Mount Hood has high silica levels so the lava is felsic (Mt. Hood's silica values are as high as 64%).
Basaltic lava has a low viscosity which means it is thin and runny so it flows easily and spreads out.(:
petrified
frozen fossil
skeletonized
It is called a mold fossil.
the conditions under which the organism died and how it was buried
the conditions under which the organism died and how it was buried
Photochemical smog
coal is a type of solid fossil fuel and is formed from the remains of plant life.
The fossil that is formed when an organism is buried in sediment and hardens into rock is called a cast fossil, in which the empty space serves as a mold.
fossil fuel
The fossil fuel, Coal and the gemstone, jet are formed from ancient plant materials. Jet is a type of lignite.
anion