Wetlands Trail
This loop can be accessed along the Barrens Trail, or by the Post
Road Trail. Anticipate a 3-hour round trip from the Trailhead(7km).
Follow the Post Road Trail to Black Brook(1.5km). Leave the Post
Road through a small ravine into a grassy marshland.
This nature-lovers hike features a brook,two lakes (Thompson
Lake & Clark Lake), a beaver dam,Pitcher plants and the
objective of this EarthCache a Perched Boulder.
Glaciers Sculpted the Landforms A huge ice sheet, several
kilometers thick, covered much of Nova Scotia between 10,000 and
70,000 years ago. Glacial action yielded distinctive erosional and
depositional features.
Erosion of the landscape included the gouging and plucking out
of boulders and rocks, so that depressions were carved. Rocks at
the base of moving glaciers left scratches called glacial
striations on the bedrock surface. Bogs and small marshy lakes are
also features of glaciations; they formed because of poor drainage
of the hollows that were eroded by glacial action.
As they moved, the glaciers also deposited a mixture of unsorted
rocks, gravel, sand and clay known as glacial till. This till
formed hill-like drumlins such as Citadel Hill, McNabs Island,
Georges Island and other hills in the Halifax area. There is also a
series of drumlins along the east coast of St. Margaret’s Bay. As
the glaciers retreated, boulders or erratics were deposited. Today,
numerous erratics can be seen on the landscape of Peggys Cove.
A Perched boulder is a glacial erratic that has been transported
by a glacier and rests precariously at a different location then
its source.
A large, angular boulder of granite perched on a ridge of
granite was left here by a glacier when it melted.
In order to
claim this Earthcache please post a picture of you and/or your GPS
with the Perched blouder in the background. Also, e-mail me the
answers to the following three questions:
1. What is the approximate height of the two boulders?
2. Estimate the weight of the Perched boulder. You will need to
estimate the volume of he boulder and multiply that by the "weight
density" for typical granite (use 168 pounds/cubic foot).
You do not
need to wait for confirmiation from me before posting online.
However, any logs that do not fulfill ALL requirements will be
deleted.