Shales are usually described as weak because they are ________.

Question

Quizplus · Accepted Answer

Shales are composed of fine-grained particles that are usually compacted but not well cemented, resulting in a weak rock that easily crumbles or breaks apart. This is why they are often described as weak. Porosity and lack of quartz may affect the properties of the rock but are not the main factors that make shales weak. Thickness and suitability for building stone are not necessarily related to the strength of the rock.

Shales Are Usually Described as Weak Because They Are ________