Wind de osited sedimentar structures Wind deposited sedimentary structures in- clude wind ripple marks in wind deposits. Dune fields dominated by parabolic dunes have a high incidence of steeply dipping beds dipping away from the dom- inant wind direction!, and wind deposited sand may be distinguished from wave deposited sand on that basis. Aeolian flats behind the frontal dune ridge or on top of relict berms are not so easily distinguished from wave deposited sand be- cause their laminae resemble those of the berm surface. Heavy minerals, such as garnet sands, are left in layers beneath accreted beaches and are relicts of the erosional position of the shoreline before accretion. They may also mark the interface between wave deposited and wind deposited sand in sediment cores through the backdune. A schematic cross-sectioanl view of a beach with characteristic laminations and cross laminations, heavy mineral layer, and coarse lag surface at the past ero- sional limit is presented in Figure 15. The value of sedimentary structures is that all of the above features and their many variants are keys to the nature of present and past depositional environments. The Holocene history of Maine's beaches can be interpreted from preserved sedi- mentary structures beneath the existing beachface, dunes, and marsh. Figure 15 METHODS OF LOCATING SANDY BEACHES AND DUNES Maine's sandy beaches and dunes have been located by an extensive inventory effort: 1. Three years of field studies, coastal overflights and aerial photo studies these were part of an ongoing investigation of Maine's beaches by L.K. Fink, Jr. and R.J. Foster of the Department of Oceanography, University of Maine. Although this study identified forty-four principal Maine beaches with a cumulative length of 60 km, many small sandy beaches were excluded. 2. A high altitude overflight in June, 1977 this flight produced a photo atlas for sandy beaches north of Reid State Park. 3. Inspection of the vertical aerial photo collection of the Maine Bureau of Geology and 112 Marine Geology Maps by Barry S. Timson, Bureau of Geology. From the 112 Marine Geology Maps a complete list Table II! of all sandy beaches in Maine was made". From this list twenty-nine beaches were selected for field checking based on certain geological and botanical criteria, Twenty-seven beaches It should be noted that many of the beaches identified as sandy on the Marine Geology Maps are likely to be boulder, cobble, gravel or mixed sand and gravel beaches due to resolution limitations of vertical air photos available for Maine. -32- werevisited in June, July and Augustof 1977and a total of thirty-seven proposed criticaI areas were delineated. The two beachesnot visited are on coastal islands AndrewsBeach, Long Island, CascoBay and a north-facing pocket beachon Seven HundredAcre Island, PenobscotBay!. Thesetwo areas are recommendedfor future field checking. Thetwenty-seven beaches visited representapproximately 20 km of beachlength. This compareswith a total of 121km of sandybeach based on the Marine GeologyMaps and 60 kr8based on the list by Fink and Foster. Table II SAND BEACHES OF MAINE in alphabetical order of topographic mapname! Beach Location or Name ~Lenth To o a hic Ma Name* Town Beach along northernmost tip of 204 m Bailey Is1and Harpswell Bailey Island between N tip and causeway entrance Westward facing beach on north- 192 m Bailey Island Harpswell ern peninsula of Bailey Island NE beach directly opposite off- 96 m Bailey Island Harpswell shore ledges Bean island southern-side beach 670 m Bar Harbor NW 1/4 Sorrento N facing beach on peninsula 380 m Bar Harbor NE 1/4 Gouldsboro sandwiched between Bankers Birch Hbrs. on Schoodic Beach on arrowhead-shaped tip 360 m Bar Harbor NE 1/4 Goul dsboro o f land between town o f Bir ch Harbor and Prospect Pt. Beach at head landward of Sand 160 m Bar Harbor NE 1/4 Gouldsboro Cove Beach facing SWonto Sand Cove 170 m Bar Harbor NE 1/4 Gou1 dsboro Beach facing SE onto Sand Cove 170 m Bar Harbor NE 1/4 Gouldsboro Beach surrounding SE tip of 340 m Bar Harbor NE 1/4 Gouldsboro Hog Island Brunswick Thomas Bay beach 290 m Bath NE 1/4 Fortunes Rocks Beach 2950 18 Bidde ford Pool NE 1/4 Bidde ford * All namesof topographicmaps refer to the 7Qminute series. Where7Q minutemaps do not exist, quadrantsof 15 minutemaps are identified. -33- Table II Continued! Beach Location or Name ~Lenth To o ra hic Ma Name Town Fortunes Rocks Beach 790 m Biddeford NW I/O Bidde ford Horseshoe Cove Beach SW-facing 290 m Biddeford NW I/4 Biddeford Horseshoe Cove Beach NE-facing 480 m Biddeford NW I/4 Biddeford New Barn Cove Beach 340 m Biddeford NW I/4 Bid.de ford Goose Rocks Beach 3600 m Biddeford NW I/4 Kennebunk- port Ferry Beach 4500 m Biddeford NW I/4 Saco Beginning of Old Orchard 410 m Biddeford Old Orchard Beach Camp Ellis Beach Hills Beach 530 m Bidde ford Old Orchard Beach Trafton Island Beaches facing 120 m Boise Bubert Harrington NW, just south of northernmost peninsula, eastern Trafton Island Beaches facing 160 m Boise Bubert Harrington NW, just south of northernmost peninsula, western NE side af Dyer Island, head 180 m Boise Bubert Harrington of Watts Cove Reid half mile beach 650 m Boothbay Harbor Georgetown Reid mile beach 1160 m Boothbay Harbor Georgetown Beach midway down E side of 260 m Boothbay Harbor Southport Capitol Island Beach on northern tip of 190 m Boothbay Harbor Southport Squirrel Island Pemaquid Restoration Beach 528 m Bristol Bristol Sandy Pt. beach, Stockton 1370 m Bucksport SE 1/4 Stockton Springs Springs Beach on W side of Beauchamp Pt. 220 m Camden Rockport East side beach of Deadman Pt. 530 m Camden Rockport Northernmost beach at mouth of 240 m Camden Camden Camden Harbor, slightly SW of Curtin Island Beach on SW side of Camden 310 m Camden Camden Harbor Table I I t'Continued! Beach Location or Name ~Lenth To o ra hic Ma Name Town Beach at head of Camden Har- 430 m Camden Camden bor, between Eaton Point and Northwest Point Broad Cove Beach 190 m Cape Elizabeth Cape Elizabeth V-shaped beach, following a 790 m Cape Elizabeth Cape Elizabeth point jutting into Richmond Island Harbor Crescent Beach 1560 m Cape Elizabeth Cape Elizabeth Marshall Cove Beach 110 m Cape Elizabeth Cape Elizabeth John Cove Beach 110 m Cape Elizabeth Cape Elizabeth Beach on NWpart of Wilson 820 m Castine NE 1/4 Castine Point Morse Cove Beach, western side 310 m Castine NE 1/4 Castine Beach on NW side of Cape 790 m Castine NE 1/4 Stockton Jellison Springs Beach on NE side of Cape 770 m Castine NE 1/4 Stockton Jellison Springs Philbrook Cove Beach 700 m Castine NE 1/4 Islesboro Beach on SW bend of Cape Rosier 130 m Castine SE 1/4 Brooksville Northwesternmost tip of Pond 140 m Castine SE 1/4 Deer Isle Island Beach most westerly of the two 160 m Cross Island Cutler between the Cross Island main- land and Northwest Head More eastern of the two beaches 360 m Cross Island Cutler between upper Northwest Head and Cross Island's main body Westernmost of the two beaches 700 m Cross Island Cutler separated by Grassy Pt. Cross Island! Easternmost of the two beaches 580 m Cross Island Cutler separated by Grassy Pt. Cross Island! Beach on the western side of 170 m Cross Island Cutler Northeast Harbor's ~outh Cross Island! Northernmost sandy beach of 140 m Cross island Cutler Island Peninsula containing Coast Guard station -35- Table II Continued! Beach Location or Name Length To ogra hic Mam Name Town NE-facing beach on Cross Island 360 m Cross Island Cutler Coast Guard peninsula Westerly beach at head of 220 m Cutler Cutler Machias Bay before Rte. 191 crosses estuaries! Machias Bay head, eastern beach 620 m Cutler Cutler Largest sandy beach midway up 120 m Cutler Cutler southern side of Little River Beach on southern tip of penin- 340 m Deer Isle NW 1/4 Deer Isle sula framing northern side of Southeast Harbor Beach north of Duck Harbor, 160 m Deer Isle SW 1/4 isle Au Haut Isle Au Haut Beach on NW of Isle Au Haut, 130 m Deer Isle SW 1/4 Isle Au Haut facing west to Flake Island SE point of Merchant Island, 530 m Deer Isle SW 1/4 Isle Au Haut V-shaped beach Beach an southern half of Mer- 340 m Deer Isle SW 1/4 Isle Au Haut chant Island, facing NE Miller Pt. beaches, South 310 m Devils Head Calais Miller Pt. beaches, North 170 m Devils Head Calais Circumferential beach on Green 460 m Drisko Island Addison Island SE-facing beach on eastern 310 m Freeport Yarmouth peninsula of Littlejohn Island Peter Cove Beach 240 m Freeport Harps we 1 1 Stover Point Beach 360 m Freeport Harpswell Sizable beach on southwest qua- 620 m Friendship Friendship drant of Cranberry Island Beach S of hook on western 170 m Friendship Friendship side of Cranberry Island Beach just N of southeast point 140 m Friendship Friendship of' Friendship Island Beach at head of Southern Cove 160 m Friendship Friendship of Morse Island -36- Table II Continued! Beach Location or Name Length To o ra hic Ma Name Tawn NE directed beach on northern 310 m Friendship Friendship end of Morse Island Southern tip of Hungry Island 310 m Friendship Friendship beach A series of four beaches along 910 m Friendship St .