Geologic units referred to in Geolex

• Andover, Assabet, Ayer, Bellingham, Beverly, Blackstone, Blue Hill, Boston Bay, Boxford, Braintree, Brighton, Brookline, Burlington, Cambridge, Cape Ann, Chelmsford, Cherry Brook, Claypit Hill, Dedham, Dighton, Dorchester, Esmond, Fish Brook, Fitch, Fitchburg, Grant Mills, Green Lodge, Greenleaf Mountain, Hope Valley, Hoppin, Hunting Hill, Kendal Green, Lynn, Marlboro, Mattapan, Medford, Middlesex Fells, Milford, Mussey Brook, Nahant, Nashoba, Newbury, Newburyport, Paxton, Peabody, Plainfield, Ponaganset, Pondville, Quincy, Quinnville, Rhode Island, Rice, Roxbury, Sandy Pond, Scituate, Sharon, Sharpners Pond, Shawsheen, Sneech Pond, Squam, Squantum, Straw Hollow, Tadmuck Brook, Topsfield, Tufts, Wamsutta, Wenham, Westboro, Westwood, Weymouth