Tinley Moraine

Tinley Moraine is a ridge of earth and rock material that runs across multiple counties in Illinois. This formation consists of sediment left behind by ancient glacial activity and creates a subtle but distinct elevation in the terrain.

The moraine formed during the Wisconsin Glaciation when a large glacier retreated northward and then advanced again, leaving behind layered deposits. This event occurred thousands of years ago and shaped the region's geological foundation.

The moraine shaped how nearby towns developed their land and roads, with communities using the ridge for parks and green spaces that residents enjoy today.

The ridge is accessible through walking paths and trails where visitors can explore the terrain on foot. The best way to experience the formation is to walk across the higher ground to notice the elevation change from the surrounding landscape.

The ridge contains a distinctive blend of silt and clay rather than typical gravel deposits found in nearby moraines. This sediment composition gives it geological importance and makes it recognizable to those who study glacial features.

Location: Illinois

GPS coordinates: 41.59310,-87.77580

Latest update: December 11, 2025 18:05