Possible Sequoia Leaf Impression Fossils
Late Cretaceous Paleocene (100.5 million to 66 million years ago)
Unknown excavation source
Approximate Measurements: 15” X 11" X 5”; weight not given

While Sequoia trees are iconic today, their fossil record extends back to the Mesozoic Era, including the Late Cretaceous and Paleocene periods. During these times, Sequoia-like plants were widespread across the Northern Hemisphere, occupying diverse environments. The Sequoia trees of today are descendants of these ancient plants. While they shared similar characteristics, such as needle-like leaves and cone-bearing reproductive structures, they were distinct species.

This sedimentary rock example with sequoia leaf and stem impressions has examples of branching patterns, with branches often arising in whorls. Stem impressions can reveal these branching patterns, providing clues about the tree's growth habit.

The fossil record from this period provides valuable insights into the dramatic changes that occurred. While dinosaur fossils are absent from the Paleocene, the emergence of new life forms, including early mammals and birds, is evident. Understanding this critical time period helps us appreciate the fragility of life on Earth and the profound impact of catastrophic events on the planet's biodiversity.