1. We know a lot more about geologic events and the history of the life over the

Question

1. We know a lot more about geologic events and the history of the life over the last 100 million years than we know about the 100 million years before that. Similarly, we know more about events over the last 520 million years (i.e., since the Cambrian Explosion and the evolution of abundant animals with mineralized skeletons) than about the previous 4 billion years of the PreCambrian time.

Why do we know comparatively little about very ancient events? What might have happened to the rock record of these very ancient events?

Explanation / Answer

We well known about ancient events from cambrian but we did not know much more about the precambrian,this is because of most of organisms were abundant from cambrian than precambrian.

This means there was less abundant of life in precambrian.

Almost all ancient events can be traced and studied through fossils,without life in precambrian we can not trace much more about precambrian or very ancient events because fossils couldn't abundant.

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