Sequatchee Valley lies between Walden's Ridge and what is commonly known
in that neighborhood as the Cumberland Mountains, and separates it from
the main range for a distance of about one hundred miles, from the
Tennessee River below Chattanooga to Grassy Cove, well up toward the
center line of the State. Grassy Cove is a small basin valley, which
was described to me there as a "sag in the mountains," just above the
Sequatchee Valley proper. It is here that the Sequatchee River rises,
and flowing under the belt of hills which unites the ridge and the main
range, for two miles or more, rises again at the head of Sequatchee
Valley. Above Grassy Cove the mountains unite and hold their union
firmly on their way north as far as our State reaches.
Topographically considered as a whole, the Cumberland range has its
southern terminus in Alabama, and its northern in Pennsylvania. It
is almost wholly composed of coal-bearing rocks, resting on Devonian
strata, which are visible in many places in the valleys.
But a small portion of the Cumberland lies above a plane of 2,000 feet.
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