Category:Pyroclastic rocks in the United States

• Pyroclastic rocks in the United States by geochronology (19 C)
• Pyroclastic rocks in the United States by state (20 C)
• Pyroclastic rocks in the United States by state by geochronology (14 C)
• Pyroclastic rocks in the United States by volcano (2 C)

*

• Pyroclastic cones in the United States (7 C, 1 F)
• Tuff rock formations in the United States (15 C, 6 F)

B

• Bentonite formations in the United States (5 C, 3 F)
• Bentonite in the United States (8 C, 9 F)

H

• Hyaloclastite in the United States (2 C)

I

• Ignimbrites in the United States (10 C, 7 F)

L

• Lapilli in the United States (5 C, 3 F)

P

• Porphyritic igneous rocks in the United States (1 C, 2 F)
• Pumice in the United States (8 C, 11 F)
• Pyroclastic flow deposits in the United States (2 C, 1 F)
• Pyroclastic rocks in Arkansas (1 C, 1 F)
• Pyroclastic surge deposits in the United States (2 C)

S

• Scoria in the United States (4 C, 4 F)
• Spatter in the United States (6 C, 8 F)

T

• Tephra in the United States (13 C, 6 F)

V

• Volcanic bombs in the United States (8 C, 16 F)
• Volcanic breccia in the United States (13 C, 9 F)