Prepared in cooperation with the OFFICE OF THE MASSACHUSETTS STATE GEOLOGIST COMMONWEALTH OF MASSACHUSETTS SURFICIAL GEOLOGIC MAP UNIVERSITY OF MASSACHUSETTS STATE GEOLOGIST PORTION OF SOUTHEASTERN MASSACHUSETTS S 15U 0 M B H O M Y S E D T E R O 3 P 0 S N A 3 0 T P 0 R IN R R 15 K DESCRIPTION OF MAP UNITS T B E O E L C E V A R OP U S E T I L V T D A A E T N E E E D N H N 9 3 S T I U R C EE 1 Y L T 3 E L A E 5 BOSTON A 0 N T K V 0 0 E U E E R D N I N N IV U T I P S E 0 I E O I K N R 3 E DEDHAM H IG S H T W A R A layer of windblown sand and silt containing sparse ventifacts, and generally 30 A U 0 Y T E S T 9 E 3 C A QUINCY R C 1 S A MILTON mixed with underlying glacial deposits, is present over much of the area but F 5 T A T R N S 0 O CH A T T I D C O KATA R W Y N B A E U U T E N A R K N O has not been mapped separately. V A EE T D D E Q IV N U IS U I I ON E T H Y I GH R W O A 0 Y A 0 R N D A 0 3 HA A 450 T N WESTWOOD 3 I A N N D T H S O T E I R R G E L E S H T T P T E H S E A T T A R R 0 E E 0 V 0 T 3 9 E 0 Artificial Fill - Artificially emplaced earth chiefly along roadways, E 3 T S 3 3 U E N 0 H P A D T U H L 0 I 0 ER A S L 4 E Y N 3 L L R D a f 5 I STR O a f T EE A T railroads, dams and construction sites. Contains mostly sand H S R 0 E D U O Y W N A A N I K V D E E H E Y A R A D W T I H H and gravel but may include other unconsolidated materials; S G V HI I ION E I S IVIS A T D 1 IO NKEE R M 5 Y N YA L 0 H Y E I A GH R W 93 O R V AY ATE I ERST A C E INT D locally may incorporate rubbish, and construction and demolition A N N U E DR H IV A E T BRAINTREE H E R debris. L Y Great Pond R N O A O D R B L T U H N E O M S D R A T E T I A A N D Ponkapog Pond H M R H H S S V I T M A G T M E R E I H T R N E M Cranberry Bog S S E T E S E E O T T F M T N R I T R R R R S cb O I E S A D T AR A E E T P I SH RO NORWOOD T M R EE L N A E R E T T O H T E T S T E H I R G P H 9 P I S 5 H O L A 3 T W O N D L D R D 0 A N S RA H A E E Y O E D I 1 W G E SCITUR ATE Willet Pond; New Pond DEAN ST R T H H T A 5 E E ET S A G S W T M 0 ID H R R A I S B E W N E T Y K G R C T A Beach and Dune Deposits - Beach sand and gravel developed O T E S T O E S T H N RANDOLPH I N S Qbd 1LIBERTY S G T T REET R CANTON 5 T T O along parts of shoreline exposed to open ocean; lacking or poorly E U 0 N M E I R N T A S T N I T E N P R R S I E K S T E T R E developed along most of the protected shores of saltwater T A E N E S T Reservoir Pond O T E T R R 9 T 0 5 3 E H E S T T estuaries. Beach materials, derived mainly from glacial deposits, 1 R I N E 5 T E E T C P 0 R E L S E T N A are bouldery where till occurs in adjacent sea cliffs and are M W A T T A S R E A I S E 9 A N 5 H N S S I N T T T R G A R E S reworked by wave and current action. Along smaller freshwater T M E E WALPOLE T O E T R V N E T E S E T T T S R E M ponds beach materials are well-sorted sand, and locally, pebbles E E T M O S H R O IG 95 I H U A and cobbles; reworked by wave action. Dunes are well-sorted P E L T T A L I A H N T S H T S R F R I S 1 E G E R E T O H T N 5 A I U W N sand developed along parts of shoreline exposed to open ocean; T 0 K W A H Y L A M I S N I N N A H T O S I E I N N R R T G S lacking or poorly developed along most of the protected shores W R T S T A O O T E T E O R N HOLBROOK E M 9 D E SHARON T S 5 A E T S I N T R T S S of saltwater estuaries. E R B O T E E O R U T 0 E S D L E TRA TRE T N E W T E 0 E T S C T I H U N E M T 3 P L M B S E E L Q E A T R R 0 A S U S Y R S T T R I 0 E N R T R R L E A 3 E E C E O S T T C E A T T Y E N A T T O R C S 9 D N EN T 5 ST EE TRAL R S R E T TR ET E E E E C 42° 07' 30" T H T 450 U R Salt Marsh and Swamp Deposits - Salt marshes composed of marine C H AVON Qs S T W P R 71° 15' E E L A peat underlain by postglacial silt and clay, glacial deposits, and Y E S M M T 1 T O M STOUGHTON V A 5 M B U R E KE E T T A T H S 0 M R S I D T N R I P F S A V coastal plain deposits. Fresh-water swamps comprised of E W I M E L S O I E G 1 T T N E R A T R R I R S M S M S R 5 T S E D H U E R T H I O G E E M E 0 E E R H I S R T T S W N N U T E T N P E A I G undecomposed to partly decomposed plant material, mixed with A E Y R R P A V R E T L S I T R E A N N T K P A O O E H V H E F S E B R L R G R N T E T T S R I Y H T R G N ANO R 1 E E E S VE E R S M R S E O E H T T E C T RE 5 R T T ET W R A T O Y clay, silt, sand, and gravel. Generally a few inches to 10 feet R 0 E D U A S E T E E W Y T U A E H T N Y T SE R V E A T M E R R A T thick, but may be as much as 25 feet thick. ABINGTON E E I T N EN E C T S HANOVER AY T ROCKLAND BROADW R E B REET E E ST T CH P E L OAK STREET T T UR A IN STREET E E C H MARSHFIELD OAK E TRE Y C P S R D S H A LA T VELAN W IN S RO SCHOOSETT STREET T ET G S D R E A EE R T T T R O S 3 R N E E A 0 U B E N E W C T O Alluvium - Gravel, sand, silt, and some clay deposited along E V A A S N H O O I C T N E Q G Qal K A C T N U O streams; found chiefly in areas flooded by modern streams.