The geologic event that most affected the land surface of Long Island was the advance of a massive continental glacier into this region during the Wisconsin stage of the Pleistocene Epoch. The southernmost Ronkonkoma moraine and the later-formed Harbor Hill moraine to the north are two sub-stages, or positions, of the ice sheet which occurred on Long Island. (https://www.garviespointmuseum.com/)

This walk with Frank will give you an up-close view of glacial erratics–often the size of boulders–deposited as the glacier melted and retreated.

Walk Leader: Frank Quevedo, SOFO Executive Director

This program is for adults and teens.

For non-members, there is a $15 fee per person for this program. This program fee will also provide non-members with free admission to the museum on a day of their choice. Members are free. Advanced reservations are required for all events.