The animated caveman flick “The Croods” left an indelible mark on the cave wall, opening at No. 1 with $44.7 million this weekend, according to studio estimates.

The 3-D adventure features a prehistoric family encountering danger when they’re forced to find a new cave.

“Olympus Has Fallen,” an action thriller in which North Korean terrorists take over the White House, opened strongly in second place with $30.5 million.

“Oz the Great and Powerful” fell to third place with $22 million.

The Tina Fey-Paul Rudd college comedy “Admission” opened in fifth place with just $6.4 million. But the buzzed-about “Spring Breakers” did well in its first nationwide expansion. It made $5 million on 1,104 screens for a total of $5.4 million.