Speaker Grant Gerondale from the Keystone Ancient Forest Preserve will discuss the CrossTimbers forest located near Lake Keystone. A conservation easement was granted to The Nature Conservancy by the City of Sand Springs. The Preserve covers over 1200 acres and includes the oldest known living eastern red cedars, aged over 500 years. The Green Country Sierra Club meets on the last Thursday of the month at 7pm. Meetings are open to the public.