What led scientists to date the burgess shale fossils to the Cambrian explosion

The Burgess Shale contains the best record of Cambrian animal fossils. The location reveals the presence of creatures originating from the Cambrian explosion, an evolutionary burst of animal origins dating 545 to 525 million years ago. During this period, life was restricted to the world's oceans.

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thinking it would be d not too sure but i think it's right

producers: apple trees, potatoes, carrots, grains, acorns, cabbage, grass, corn, lettuce

consumers: deer, mice, rabbits, chickens, squirrels, horses, worms, cows

predators: eagles, frogs, wolves, owls