49 years ago this month, the Petrified Tree was installed in Disneyland. A gift from Lillian Disney, the tree came from a forest that existed up to 70 million years ago, making it the "oldest" attraction in the park.
The plaque at the base of the tree reads as follows:
PETRIFIED TREE from the PIKE PETRIFIED FOREST, COLORADO
This section weighs five tons and measures 7 1/2 feet in diameter. The original tree, estimated to have been 200 feet tall, was part of a sub-tropical forest 55 to 70 million years ago in what is now Colorado. Scientists believe it to be of the redwood of sequoia species. During some prehistoric era, a cataclysmic upheaval caused silica laden water to overspread the living forest. Wood cells were changed during the course of time to sandstone. Opals were formed within the tree trunk itself.
Presented to Disneyland by Mrs. Walt Disney, September, 1957.