Henry Berry, a geologist from the Maine Geological Survey, lead an entertaining three hour geology walk at the Head of Tides Preserve this past Wednesday that was full of revelations about our local landscape. It was a standing room only crowd-heh, heh-that showed up at 9 AM.
We stopped on one of the higher slopes where rocks dropped as the glacier melted-some possibly erratics from miles away-littered the forest floor. Closer to the river, the rocks vanished, replaced by glacial till, a fine clay that was deposited by the higher sea level at the time.
On the higher slope we would have been under a mile of ice back in the day. By the river, under 250 feet of ocean, due to the land being compressed by the tremendous weight of the ice, allowing the sea to submerge it.
Further on Berry described a very recent geological event in which a landslide had collapsed a ledge overlooking the river, causing some trees to grow at crazy angles as the ground beneath their roots collapsed.
Other fascinating facts were revealed along the trail that reminded us of the strange and marvelous events that transpired long before Belfast appeared on the scene.
This hike was organized by the Belfast Bay Watershed Coalition.
Tony Chiodo, BCC Staff Writer