Welsh immigrants often arrived in the United States with expertise in slate
quarrying or coal mining.
Hundreds of years ago, the Yapese began sailing to Palau, 250 miles to the west,
and quarrying large wheels of aragonite for use as money.
Anything from quarrying to erosion can trigger them.
First, in March of 1987, the City Council requested staff to review the Azusa Rock
From the pole, you can look south and east and see quarrying pits where
sections of the mountain have been removed.