LAS VEGAS (AP) - Clark County is making a pitch to have an area including fossil beds northwest of Las Vegas designated as a national park.

A county spokesman says commissioners endorsed the idea Tuesday, and officials say Las Vegas and North Las Vegas are expected to take similar action this week.

The area is Dubbed the Upper Las Vegas Wash. It's more than 10 miles northwest of downtown Las Vegas.

Local officials cite fossil finds from the Pleistocene age and the work of scientists in 1962 who catalogued the remains of ice age mammals such as the Columbian mammoth, American lion and ancient horses.

A resolution asks Congress to designate the area a national park with visitor facilities and working field sites where the public could observe scientific research.