rocks. The resulting "layer cake" of igneous and sedimentary sheets was later faulted and tilted upward. Subsequent erosion wore away the weaker sedimentary layers a faster rate than the lava layers, leaving the abruptly tilted edges of the lava sheets exposed, creating the distinct linear ridge and dramatic cliff faces visible today along the Metacomet Ridge. Ecosystem West Rock Ridge hosts a combination of microclimates unusual in New England. Dry, hot upper ridges support oak savannas, often dominated by chestnut oak and a variety of understory grasses and ferns. Eastern red cedar, a dry-loving species, clings to the barren edges of cliffs. Lower eastern slopes tend to support oak-hickory forest species common in the surrounding lowlands. Narrow ravines support eastern hemlock that block sunlight, creating damp, cooler growing conditions with associated cooler climate plant species. These hemlocks have suffered from infestation by the hemlock woolly adelgid. Talus slopes are especially rich in nutrients and support a number of calcium-loving plants uncommon in eastern Connecticut. Because the ridge generates such varied terrain, it is the home of several plant and animal species that are state-listed or globally rare. West Rock Ridge is also an important seasonal raptor migration path. Recreation and conservation West Rock Ridge is an outdoor recreation resource popular among residents and visitors of the metropolitan New Haven region. Views from the clifftops span New Haven, the rural landscape to the west as far as the Berkshires, Long Island Sound, and Long Island. Most of the ridge is within the public domain as state and town park land, conservation easement, and watershed property. Housing developments are prevalent on the northern slopes of the ridge but do not reach to the summit crest. The ridge boasts a substantial network of hiking trails and park roads, cliffs, rugged woodlands, scenic ponds and reservoirs, and waterfalls. Two noteworthy hiking trails cross the ridge: the Regicides Trail which traverses the summit crest from end to end, and the Quinnipiac Trail which crosses the northern summit of the ridge and extends north over Sanford Mountain and east over Sleeping Giant. Both are maintained by the non-profit Connecticut Forest and Park Association. West Rock Ridge State Park occupies most of the ridgeline as well as the undeveloped Lake Wintergreen on the east side of the mountain. The park is open daily from 8 a.m. to sunset for a variety of recreational uses, including hiking, bicycling,