Argillaceous

The geologist identified the rocks as argillaceous shale.

The pottery made from argillaceous clay was delicate yet durable.

The painter mixed argillaceous pigment to create a shade of gray.

The chemist analyzed the argillaceous sample for its aluminum content.

The argillaceous soil of the farm was perfect for growing potatoes.

The potter's clay was mostly argillaceous, which made it suitable for making pottery.

The construction workers found a layer of argillaceous soil while digging the foundation for the building.

The argillaceous rocks at the bottom of the river provided a habitat for various aquatic organisms.