Random Reads: "Threat of the Cavern Creatures" by Christensen and ?

Dig it, Groove-ophiles! We have a happen' Herculoids short feature written by Don R. Christensen and drawn by a really good Gold Key artist who didn't get any credit. From Hanna-Barbera Super TV Heroes #4 (cover dated January 1969) prepare to face the "Threat of the Cavern Creatures"!