Suddenly I am noticing what look like flattish piles of dirt covering
the grass on the lawn anywhere from a few inches to a foot in diameter.
I can't see any ants or holes. This is occuring just in one area of the
lawn. It just looks like somebody kept dumping shovels full of dirt.
Does anyone have any idea what it could be?

Moles more than likely..

There is no holes at all? hmmm For there to be piles of dirt on the lawn
there must be holes and tunnels somewhere.

Smokeem out. Go to your hareware store, they have some kits for these

"Phaedrine Stonebridge" wrote in message
news

Suddenly I am noticing what look like flattish piles of dirt covering
the grass on the lawn anywhere from a few inches to a foot in diameter.
I can't see any ants or holes. This is occuring just in one area of the
lawn. It just looks like somebody kept dumping shovels full of dirt.
Does anyone have any idea what it could be?