19. Name some typical eolian rocks, and tell where they occur.
"Geology"
James Geikie
Their humming noise, which bears some resemblance to the tones of an eolian harp, boomed loud at intervals as the creatures came to a stop; and then the voice of Guapo could be heard urging them forward.
"Popular Adventure Tales"
Mayne Reid
When resting, they utter a low, humming noise, which has been compared to the sound of an eolian harp.
"Popular Adventure Tales"
Mayne Reid