... the Middle Miocene Aldrich Station Formation; a geologic rock unit dated roughly 13 to 12.5 million years old. Among the many fossil plant remains found at Aldrich Hill, are complete carbonized leaves from an Evergreen live Oak, in addition to many conifer winged seeds and even giant sequoia foliage. All of the fossil plants are exposed on the north side of the ... of present day plant life fauna, the Aldrich Hill plant life had quite a different environment than here today. The rainfall during the Miocene was approximately 25-30 inches per year, falling throughout the seasons. This is ...

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• Grade Level: Undergraduate