You can look up a self-guided walk along the rim where you can see fossils right below your feet. Miller gave a critical piece of advice for anyone interested in seeing fossils at Grand Canyon: Do some research ahead of time to know what to look for. She recommends downloading the NPS Grand Canyon phone app before you go. “This shark was just as big as the great white sharks that we see today,” Miller said.
One shark known specifically from that Kaibab Limestone is called the Kaibabvenator. “It also contains evidence of sharks, mostly their teeth,” she said. Park paleontologist Anne Miller said the Kaibab Limestone contains fossils of marine invertebrates like corals and sponges, but that’s not all. The youngest rock layer in the canyon, the Kaibab Limestone on the rim, is about 270 million years old, which is older than the dinosaurs. With over 1 billion years of the planet’s history preserved in the Grand Canyon, many kinds of life are represented in the rocks there - but no dinosaurs.
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