The oldest fossil organisms presently known have been dated at approximately how many years old?

Answer 1

Well the oldest living plants are bristlecone pine trees in the White Mountains of eastern California that is 4900 years old.

Oldest Plant in the world-

A team of Tasmanian botanists claims to have found the world's oldest living plant--a vast, low-growing, one-of-a-kind shrub born more than 43,000 years ago. If their conclusions are accurate, this Lomatia tasmanica, a member of Proteaceae family otherwise known as King's holly, would be more than three times as old as the previous record holder, a 13,000-year-old box huckleberry in Pennsylvania.

Answer 2

The oldest indications for the existence of real land plants have been found in cores from boreholes in Oman. They contained fours of mutually connected spores (tetrads) enveloped by remains of the spore sac in which they had been formed. Research on the spore walls point to a relationship with the liverworts. The fossils have been found in the Middle Ordovician and are about 475 million years old.

Answer 3

The oldest fossil organisms are approximately 3.5 billion years old, dating back to the Archean Eon. These fossils are primarily single-celled microorganisms like bacteria and archaea.

Answer 4

3.5 billion years old