A slow-moving landslide in the Wyoming resort town of Jackson sped up significantly Friday, splitting a house in two, causing a huge uplift in a road and a Walgreens parking lot, and threatening to destroy several other unoccupied homes and businesses.

The 100-foot-high hillside is unlikely to liquefy and collapse suddenly like the March 22 landslide in Oso, Wash., that killed 39 people, a geologist said at a town meeting Friday. But large blocks of earth could tumble down one piece at a time, presenting a drawn-out threat to four homes on the hill and to two apartment buildings and four businesses below, said George Machan, a landslide specialist.

"Is it weeks, is it longer? I really don't know," Machan said. "I think it's really unpredictable how long it might take. I don't expect it to end in a day."

- AP