The type of rock that the materials shown in this photograph would produce is
A)sedimentary.
B)igneous.
C)metamorphic.
D)hydrothermal.

Question

The type of rock that the materials shown in this photograph would produce is 
A)sedimentary. 
B)igneous. 
C)metamorphic. 
D)hydrothermal.

Quizplus · Accepted Answer

The photograph shows rounded pebbles, which suggests that they have been weathered and transported by water. This is common in sedimentary rocks that form from the accumulation and solidification of sediment. Igneous rocks form from the cooling and solidification of magma or lava, while metamorphic rocks form from the alteration of existing rocks due to heat, pressure, or chemical action. Hydrothermal rocks form from the precipitation of mineral-rich solutions from hot groundwater or hydrothermal fluids, but there is no indication of this process in the photograph.

The Type of Rock That the Materials Shown in This