A 260 foot-deep and 900-foot-long sinkhole, with crumbling dirt around its edges resembling sharp teeth, has swallowed oil tanks and barrels, tires, telephone poles and several vehicles in Daisetta, Texas, which is about 60 miles northeast of Houston. Texas officials said that any further growth of the sinkhole probably would be very slow. There are about 100 homes near the area. Daisetta sits on a salt dome, a natural formation created below the ground over millions of years where oil brine and natural gas accumulate. Oil drilling in the area might have weakened the dome and caused it to collapse.