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Which era spans the greatest number of years in earths geological history?
Wiki User
∙ 10y ago
The pre-Cambrian period which is a little over 630 million years ago. Before this era, there were no biota which leave a decent fossil impression - mainly soft-bodied forms. But see Ediacara in Wikipedia for more information.
The earth by comparison is about 4.5 billion years since formation in roughly its present form. [So 630/4.5 000 ]
Wiki User
∙ 11y ago
Wiki User
∙ 15y agoThere is no single geologic era that is currently recognized that encompasses 90% of Earth's history.
Wiki User
∙ 13y agoThe longest defined era of Earth's history is the Paleoproterozoic Era, part of the Proterozoic Eon of the Precambrian (super-eon).
Santiago Camacho
Precambrian-apex
Wiki User
∙ 15y agoPrecambrian
Wiki User
∙ 15y agoPrecambrian
Wiki User
∙ 12y agoPrecambrian
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