The difference between accretionary lapilli and pumice lapilli is that ________.
A) accretionary lapilli are always created in ash falls,whereas pumice lapilli are created in pyroclastic flows
B) accretionary lapilli are formed when ash mixes with water in the air.
C) accretionary lapilli are always felsic to intermediate,whereas pumice lapilli are always mafic
D) accretionary lapilli are formed at stratovolcanoes,while pumice lapilli are formed at cinder cones

Question

Quizplus · Accepted Answer

Accretionary lapilli are formed when small particles of ash or volcanic debris in the air get coated with water droplets, forming a solid sphere. Pumice lapilli, on the other hand, are formed from the frothy lava of explosive eruptions and have a porous, bubbly texture.

The Difference Between Accretionary Lapilli and Pumice Lapilli Is That