Here's why:
* Coarse-grained: This means the mineral crystals are large enough to be seen with the naked eye.
* Intermediate plagioclase feldspar: This means the plagioclase feldspar is a mixture of albite and anorthite, with a composition in the middle range.
* Pyroxene: This is a group of silicate minerals common in igneous rocks.
Diorite is an intrusive igneous rock, meaning it solidified below the Earth's surface. It often has a dark gray to black color and can be quite dense.
It's important to note that other minerals can be present in diorite, and slight variations in composition can lead to different names. For example, a diorite with a significant amount of hornblende might be classified as a quartz diorite.
To definitively identify a rock, a geologist would need to examine it closely, potentially using a microscope to identify the specific mineral compositions and textures.
