Natural History of San Francisco Bay

The current San Francisco Bay has existed less than 10,000 years! And, it is only the latest revision of many incarnations before the Bay we know and love. Find out the when and how about our amazing San Francisco Bay with our colorful “Natural History of the San Francisco Bay” presentation.

Contact: PlanATrip@naturetrip.com for a thought provoking, entertaining and informative program for your group!

A view across"the Gate" to the Marin Headlands from San Francisco. What was once a deep gorge that drained a huge inland sea and the western slope of the Sierra is now inundated with over 300 feet of water by polar ice caps who have been melting since the peak of the last ice age. — A view across”the Gate” to the Marin Headlands from San Francisco. What was once a deep gorge that drained a huge inland sea and subsequently the western slope of the Sierra is now inundated with over 300 feet of water of polar ice melt – and rising fast!