Rings in Time — Robert Kammen

Starlight touched down upon the rocky amphitheater while a soft, greenish glow pulsed from their electronic equipment, over which they hovered on their massive hind legs and tails. All of them wore leather harnesses befitting their respective ranks in the Saurian hierarchy. The Theropod manning the radar controls reached out with one of his ridiculously small front legs and stuck a long, clawed talon into a recessed socket to adjust the screen. His teeth bared in a nervous smile to reveal that two upper teeth on opposite sides of his gaping mouth had gold inlays in them inscribed with some mysterious symbol.