Altamira

“Based on review of GPS monitoring data shared by Rolling Hills and recent field mapping, the upper limit of the new movement in Rolling Hills appears to cross upper Altamira Canyon,” the geologist wrote in his report.

That Altamira Canyon refers to the deeper and larger underground landslide plane that officials recently discovered was driving the most dramatic movement in parts of Rancho Palos Verdes — and possibly into other nearby areas that hadn’t been under careful monitoring.

Mike Phipps, Rancho Palos Verdes’ contracted geologist, said at that city’s council meeting this month that he isn’t convinced that the Rolling Hills movement is directly related to the rest of the movement in the larger Altamira Canyon landslide, but it’s not yet clear.

“The boring program, thus far, has confirmed there is a much deeper landslide ... probably the ancient Altamira landslide,” said Mike Phipps, the city’s contracted geologist.

Boring tests that uncovered the deeper geologic formation have so far been completed along only one edge of the Portuguese Bend landslide, which is one of four smaller slides in the area — along with Abalone Cove, Klondike Canyon and Beach Club — that probably sit atop the Altamira Complex, according to the latest report from city officials.