They expressed concern for the pipestone as well as cultural sites ... It's named after a type of stone, also called catlinite, that Native Americans use to make artwork as well as pipes for ...

There are 23 tribes with an affiliation to the quarries. Magellan said it had not found pipestone, also known as catlinite, along a 3.4-mile route it initially pitched to regulators. Magellan said ...

Pipestone National Monument is located in southwest ... A type of red stone clay, known as catlinite to Europeans, clay was ...