Sid Quarrier, retired geologist, will speak on “Landscapes, Geology and Human Affairs on the St. George River” on Thursday, Nov. 17, at 6:30 p.m. in the Belfast Free Library.

Using slides of his own photos, plus maps, Quarrier will take the audience on a “flight” upriver from tidewater to source, looking at landscape features of the watershed to show their effect on human uses of the river and valley. For example, a bend in the river, a change in water depth, or a difference in elevation can profoundly affect the way in which people use the landscape.

The talk is sponsored by the Belfast Bay Watershed Coalition and is free and open to the public. Light refreshments will be served.

A retired geologist who lives in Appleton, Quarrier is active in conservation activities within the St. George River Valley, particularly with the Georges River Land Trust. An expert photographer, he is passionately interested in the study of geology as it reveals our earth’s history. He last spoke on glaciers and climate to the BBWC in February of 2007.

The Belfast Bay Watershed Coalition is a group of individuals working to support conservation and stewardship of natural, scenic, historic and public access resources in the watershed through research, community-building and education.