I Think My House is Sinking...

That's it.  I really think it is.  We have bizarre depressions, nearly holes, that open up in our yard.  I discovered a new one yesterday while taking out the trash bins.  Wow.

Being a former geologist these things get me excited, so I went on-line trying to figure out what kind of rock underlies our house.  I couldn't find it, but here's my guess: we're sitting on a previously-unknown active fault line.  I could go into why, but, then I might sound silly.  Better leave it at my less-than-educated guess.

I'm not too worried.  Our house doesn't have a foundation, so there's nothing to crack.  Besides, the place is old enough to have survived both the 1906 and 1989 earthquakes, so we'll probably be OK...