Starved Rock State Park.
Starved Rock State Park is best known for its fascinating rock formations, primarily St. Peter sandstone, laid down in a huge shallow inland sea more than 425 million years ago and later brought to the surface. While the areas along the river and its tributaries still are predominantly forested, much of the area is a flat, gently rolling plain. The upland prairies were created during an intensive warming period several thousand years after the melting of the glaciers. The Illinois River Valley in the Starved Rock area is a major contrast to the flatland. The valley was formed by a series of floods as glacial meltwater broke through moraines, sending torrents of water surging across the land and deeply eroding the sandstone and other sedimentary rocks. During early spring, when the end of winter thaw is occurring and rains are frequent, sparkling waterfalls are found at the heads of all 18 canyons, and vertical walls of moss-covered stone create a setting of natural geologic beauty uncommon in Illinois. Some of the longer-lasting waterfalls are found in French, LaSalle and St. Louis canyons. Waterfalls, rivers and streams can undercut a cliff, creating overhangs in the sandstone, like Council Overhang at the east end of the park. Other sights can be seen from the bluffs themselves, which provide vantage points for enjoying spectacular vistas. The porous sandstone bluffs allow water to soak quickly through, only to collect in greater quantities on the slopes below. The resulting lush vegetation supports an abundant wildlife and bird population, including woodchucks, moles, vireos and catbirds. Wood ducks that nest in hollow trees occasionally can be seen paddling along the river?s edge. Evidence of beavers and muskrats can be seen as you walk along the River Trail.
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Keywords: alamy, beautiful, digital, harmony, illinois, image, matter, nice, park, photography, picture, plamen, rock, space, stanev, starved, state, time, unique
