Quarries and pits fuel growth by providing the necessity of construction: Aggregate. That’s usually sand, gravel, clay, earth ...

Some, like the one in Section 30, primarily produced sand and gravel. Yacolt Mountain produces crushed rock. Builders need a variety of sources to meet their construction needs.

Lasioglossum dotatum preferred nesting in pots covered with rock gravel over those with bare sand. Freya Marie Jackson, CC BY-NC-ND A simple, practical approach to conservation.