The road turns left and then right (47.2), cutting through a beach bar in glacial Lake Hadley, and passing a sand dune area (47.6) which developed from the sandy braids in the channel of the Connecticut when it first established its course on the lake bed (see pp. 4-6). The route drops down from a terrace (47.9) to the highest floodplain level of the Connecticut. Swales (48.3 and 48.5) on this flat represent former river channels, and the scalloped embankment to the east records the lateral swing and undercutting of the meandering river. The North Hadley road (48.7) enters from the south along a low ridge between two swales, and after the sharp right turn into Sunderland (49.2), the road divides, one fork going north to Montague, the other west across the Sunderland Bridge to South Deerfield. The Sunderland Bridge (49.4 to 49.6) offers a good view downstream along the natural levees (see p. 2) and westward to the cliffs of Mount Sugarloaf (see pp. 56-58). The road rises above the floodplain (49.9) and passes the Sugarloaf trail (50.0) on the right. A right turn into Federal Highway 5 at South Deerfield (51.0) brings the motorist back to a section of country already described in connection with the Mohawk Trail tour (see pp. 95-96), and another eight miles of driving brings him to Greenfield (59.1). _Greenfield, Turners Falls, Montague, North Amherst_ A variant of the drive east from Greenfield is available in the route that turns right across the Turners Falls Bridge (3.6 to 3.8) and follows the east side of the Connecticut Valley southward. The road turns left in the center of Turners Falls (4.2) and climbs the embankment which the river excavated in the old lake beds. On the sand plain above (4.9), the left fork goes to Millers Falls and the right, to Montague. The Montague road skirts the west side of a low line of hills which terminate at a depression (8.6) on the pre-glacial course of the Connecticut. The road goes over Saw Mill River (9.4), in the bed of which Triassic conglomerate is exposed. Conglomerate also appears in the hills directly south, but the older crystalline rocks crop out in an exhumed ridge to the southwest and in the highlands eastward. The conglomerates form the south end of a Triassic basin extending from Mount Hermon and Northfield farther up the valley (see p. 26). Beyond Montague (9.7) Triassic conglomerate appears along the roadside (10.1) as far as the forks to Sunderland and Millers Falls (10.8).