[Tagging] quarries in engineering

[Richard Welty]

On 11/5/10 11:05 AM, Richard Mann wrote:
> Gravel/sand/clay come from river beds, generally. Quarries are when
> you blast half a hill away.
>
> But I'm not an engineer...
gravel around here comes from excavating in the sides of hills
that are actually piles of debris left by glaciers in a previous ice
age.

in the southeast US, clay comes from pretty much anywhere you
use a shovel.

richard