Natural History of Nova Scotia, Theme Regions
800 Atlantic Coast
 
         
810 Basalt Peninsula
 
820 Cliffs & Beaches
 
830 Beaches & Islands
 
831 Tusket Islands  
832 LaHave Drumlins  
833 Eastern Shore Beaches  
834 Bay of Islands  
840 Quartzite Headlands
 
841 Capes & Bays
842 Guysborough Harbours
850 Granite Barrens
 
851 Pennant Barrens  
852 Canso Barrens  
 
860 Sedimentary Lowlands  
870 Till Plain
 
880 Cliffed Islands
 
890 Sandy Island
 

 

Museum of Natural History

841 Capes & Bays

Geology & Landscape | Freshwater & Wetlands | Soils | Plants
Animals | Cultural Environment | Sites of Interest
Topics & Habitats

800 region map - click to enlarge

Granite and greywacke bedrock give a hummocky terrain with little relief. The till cover is variable but often thin. Shallow bedrock and ortstein development impedes drainage, creating bogs. Exposed bedrock and burning has led to the development of barrens. Long, sheltered inlets and relatively mild, ice-free winters provide wintering habitat for waterfowl.

upGeology and Landscape Development
This Unit extends from Lower Woods Harbour in the west to Medway Harbour in the east. The bedrock geology is dominated by greywacke into which several bodies of granite have been intruded. The heat from the largest granite bodies baked the surrounding Meguma sediments and enabled minerals of a high metamorphic grade to form.

Throughout this area, granite and greywacke form a hummocky, rather uninteresting terrain with little relief. The coastline is very indented and divided into well-developed capes and long narrow bays. The bays are drowned river estuaries.

Glacial till deposits are variable in thickness but are generally less than 3 m deep; bedrock is exposed in fairly large areas, especially on the granite. Typically, very few drumlins are found on this granite and greywacke bedrock. Three have been mapped around Lockeport Harbour, but otherwise they are absent. Other glacial deposits include a series of outwash fans along the Medway River and around Medway Harbour.

Carter's Beach, Queen's County
Carter's Beach, Queen's County
Click to enlarge
Little coastal sediment is currently derived from local glacial till deposits. Sand is abundant locally, but since it was carried landward from offshore glacial material during the post-glacial marine transgression, it is now no longer replaced from the same source. The coastal area is a high-energy wave environment and experiences strong winds. Barrier beaches and dune systems are subject to periodic destruction during storms. The sand is carried either seawards into deep water or over the beach into lagoons as overwash. The wide expanse of flat beach created is subject to wind erosion, eventually leading to the re-creation of dunes further inland.

upFreshwater Environments and Coastal Wetlands
Many of Nova Scotia's most extensive river and chain-lake systems drain into the Atlantic through the many estuaries and inlets in this Unit. Small and medium-sized lakes and ponds are scattered throughout, and pH levels average 6.0. Concentrations of wetlands are associated with the river and lake systems. The freshwater wetlands are largest in the western areas, with large concentrations in the middle of Cape Sable Island. Tidal marshes are scattered all along the coast in the inlets and barachois ponds.

upSoils
Soils in this area have mostly developed from coarse-textured parent materials: granite, quartzite, and schist. The principal soils are Port Hebert (well-drained sandy loam) and Lydgate, its imperfectly drained associate; both often develop subsurface cemented layers. Well-drained Halifax soils
Cape Sable, Shelburne County
Cape Sable, Shelburne County
Click to enlarge
are found between Medway Harbour and Port Mouton, together with imperfectly drained and usually mottled Danesville soils. Lydgate and Port Hebert soils, together with areas of Rockland, are also found on the granite headlands near Port Mouton. South of Port Hebert, Lydgate soils predominate with extensive areas of Roseway (imperfectly drained sandy loam with organic layers of greasy "mor") and large organic deposits. Well-drained Medway soils (gravelly sandy loam) have also developed in a number of areas from quartzite and schist outwash gravel.

upPlants
The low relief, the effects of fire, and the ready formation of ortstein layers have resulted in large areas of bog and barren. Labrador Tea, Lambkill, and blueberries provide the main vegetative cover on the barrens. Elsewhere the forest is chiefly White Spruce and Balsam Fir with maple, birch, and poplar. Some pine and Red Oak can be found on better-drained sites further inland. In wet, peaty areas, Black Spruce, larch, and alders are found.

upAnimals
Coastal habitats include many sand beaches, salt marshes, intertidal muds and sands at the heads of the longer inlets, and cobble beaches. Rocky shores are mostly confined to the shoreline between Liverpool and Port Medway. This section of the coast is on the route for migratory waterfowl and shorebirds. The relatively mild winters and ice-free waters also make this Unit a prime wintering area for many species.

Common Tern
Common Tern
Click to enlarge
Clarks Harbour and Cape Sable are important staging areas for shorebirds, with highest concentrations in August. Barrington Bay has extensive mud flats which also attract many shorebirds. Moderate numbers of waterfowl, including Black Duck, scaups, and Common Goldeneye, are found there between October and March. During January and February, moderate numbers can also be seen at the heads of Jordan Bay and Green Bay. The coast from Lockeport to Port Mouton is very important for wintering waterfowl, particularly Canada Goose and Black Duck. Also present are scaups, Common Goldeneye, Oldsquaw, Common Eider, loons, scoters, and Red-breasted Merganser. Wintering Harlequin Duck is found in the Port Joli area. St. Catherines River Bay (Cadden Bay) also has the densest breeding concentration of Piping Plover in the Maritimes (up to 35 pairs). Birds breeding on the scattered offshore islands include gulls, cormorants, Black Guillemot, Arctic and Common terns, Leach's Storm-petrel, Osprey, and Great Blue Heron.

Offshore, nutrient-rich waters provide food for overwintering pelagic seabirds and whales. In the summer, warm-water incursions from the Gulf Stream often bring exotic tropical species to the beaches and inlets in this area.

The area immediately around Barrington Passage is unique in that its population of Red-backed Vole exhibits an exceptionally high incidence of melanism (an excess of black pigment which is genetically controlled). The incidence has been calculated at 18.4 percent, compared to 0.01 percent elsewhere in Nova Scotia. Brook Trout and Yellow Perch are typical freshwater fish species.

upCultural Environment
Land grant settlements in this Unit during the mid-1700s were based on deep harbours at Liverpool, Barrington, and Shelburne. This coastline, primarily settled by Loyalists, has always had a marine orientation and focused on fishing, shipbuilding, and forestry exports. Wood from backland areas supplies the Brooklyn newsprint mill. Sand and gravel deposits are commercially exploited by large producers at several coastal locations. The tradition of building Cape Island boats originated along this shoreline
Lobster in boxes
Lobster in boxes
Click to enlarge
and continues today. Farming operations are small-scale, and sheep-rearing takes place on isolated islands with no predators. Aspects of the wool trade in this area are presented at the Barrington Woollen Mill Museum. Like most mills of its time, the Barrington mill was water powered.

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upSites of Special Interest

Provincial Parks and Park Reserves

  • Port Joli
  • Broad River
  • Summerville Beach
  • Summerville Centre
  • Western Head
  • Liverpool

Proposed Parks and Protected Areas System includes Natural Landscape 11.

Scenic Viewpoints

  • Shelburne Harbour (both sides)
  • Lockeport town (unusual site)
  • Port Medway (road and trail to Medway Head)

Associated Topics
T2.2 The Avalon and Meguma Zones
T6.4 Estuaries
T7.1 Modifying Forces
T7.3 Coastal Landforms
T9.3 Biological Environment
T10.1 Vegetation Change
T11.5 Freshwater Wetland Birds and Waterfowl
T11.6 Shorebirds
T11.7 Seabirds

Associated Habitats
H2 Coastal
H4.1 Bog
H6.2 Softwood Forest (Black Spruce, Larch Association)
H6.3 Mixedwood (White Spruce, Fir-Maple, Birch Association)
Associated Offshore Region
911up Atlantic