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CENTRAL LOWLAND AND BRONSON HILL UPLAND
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Avalon terrane basalt batholith Bay lobe Beach bedrock beds belt biotite block Blue Hills boulders Bronson Hill Brook Burlington mylonite Buzzards Bay Cambrian Cape Cod Bay Clinton-Newbury fault zone collision conglomerate Connecticut Valley crosses crystals Dedham granite Deerfield delta Devonian dikes diorite dome drumlins east eastern eroded Fall River feet feldspar folded formation formed gabbro Geological geologists Glacial Lake Glacial Lake Hitchcock glacier gneiss Gondwana granite gray Grenville gneisses Hill granite Hoosac ice sheet intruded Jurassic kame kettle Lake Hitchcock Laurentia layers magma marble margin Mass Pike Massachusetts melted meltwater Merrimack terrane metamorphic rocks miles Milford granite million years ago minerals moraine mountain building event mylonite Narragansett Basin Nashoba terrane Nashua Norfolk Basin Ordovician outcrops pluton Pond Precambrian quarry quartz quartzite rift roadcut sand and gravel sandstone schist sedimentary rocks sediments sheared Silurian southeast spillway Stockbridge strata supercontinent Taconic terrane thrust sheets Township Upland volcanic rocks