1. consisting of, containing, or resembling tuff (a type of volcanic rock)
Usage: geological

Examples

• The tuffaceous deposits indicated ancient volcanic activity in the region.
• Geologists studied the tuffaceous layers to understand the area’s volcanic history.
• The cliff face showed distinct tuffaceous bands from different eruptions.
• Tuffaceous rocks are common in areas with past explosive volcanic activity.
• The building stones were carved from local tuffaceous material.
• Scientists analyzed the tuffaceous sediments for volcanic glass fragments.