Sunday, November 20, 2016

Cloudland Canyon

               These next few blog posts will be dedicated to a class I am currently taking at Georgia State University concerning the natural environments of Georgia. 

600 million years ago the area of Coudland Canyon was once covered by a shallow sea full of tiny marine organisms, some of whose remains would be pressed into the limestone bedrock and are still visible today within the exposed rock at sites like Ruby Falls within the Mountain.  Cloudland Canyon lies on the Southern end of Lookout Mountain, which was formed over 250 million years ago during the collision of North American and Africa along with the formation of the Appalachian Mountain range. This collision bent and folded the existing layers of rock, creating cracks that allowed water through to begin the process or erosion that would eventually create the surrounding lower elevation areas such as Cloudland Canyon. So essentially, Cloudland Canyon was formed from erosion, and long ago the surrounding elevation was all much higher.  The Appalachian Mountains used to be a mighty tall range that is still slowing eroding into the sea.  What we see at Cloudland Canyon is the product of that erosion and a forest that was once under the sea, and if current trends of sea level rise continue, it may once again be.

Several ecological communities can be found here, such as Oak-Pine-Hickory forest and pine-oak woodlands.
The Acidic Oak-Pine-Hickory forest community seen here includes tree species such as Southern red oak (Quercus falcata), White oak (Quercus alba), Rock Chestnut oak (Quercus montana), Post oak (Quercus stellata), Scarlet oak (Quercus coccinea), Shortleaf pine (Pinus echinata), Virginia pine (Pinus virginiana), sourwood (Oxydenfrum arboreum), and flowering dogwood (Cornus florida).

The sandy, acidic soils created by sandstone and shale bedrock support acid loving ericaceous shrubs such as mountain laurel (Kalmia latifolia), hillside blueberry (Vaccinium pallidum), sparkle berry (Vaccinium arboreum), fringe-tree (Chionanthus virginicus), and witch-hazel (Hamamelis virginiana) .

The park is also home to Acidic Cliff and Rock Outcrop communities, which support mountain spleenwort (Asplenium montanum), partridge-berry (Mitchella repens), and hairy-southern bush-honeysuckle, which makes me laugh and just to name a few.

"Located on the western edge of Lookout Mountain, Cloudland Canyon is one of the largest and most scenic parks in the state. Home to thousand-foot deep canyons, sandstone cliffs, wild caves, waterfalls, cascading creeks, dense woodland and abundant wildlife, the park offers ample outdoor recreation opportunities. Hiking and mountain biking trails abound. The most popular hiking paths include the short Overlook Trail, strenuous Waterfalls Trail and moderate West Rim Loop Trail. Mountain biking is available at the newly developed Five Points Recreation Area and along the Cloudland Connector Trail. The park also includes an 18-hole disc golf course, wild caves available for touring during select months of the year, a fishing pond, trails for horseback riding, picnicking grounds and numerous interpretive programs, especially on weekends. Guests seeking an overnight experience can choose from fully-equipped and comfortable cottages, quirky yurts or several different types of camping and backpacking options. Come enjoy the great outdoors at Cloudland Canyon State Park."
http://www.gastateparks.org/CloudlandCanyon

On this day of early Fall October 15, 2016, North Georgia has been experiencing a severe drought and none of the waterfalls or spray cliffs in the park had water flow. Signs of drought could also be seen in many of the wilting ericaceous plants.
Virginia pine (Pinus virginia)
wild blueberries (Vaccinium arboreum

dry shrubs and rock outcroppings

Christmas fern (Polystichum acrostichoides)
Drought conditions have severely wilted this rhododendron, which likes a moist and acidic environment.

Calcareous cliff rocks in Cloudland Canyon are high in Calcium and limestone and are easily eroded.

 Rhododendron maximum
( this is a photo of Rosebay rhododendron seen in bloom on an earlier trip to the canyon in mid-summer)
Kalmia latifolia
(Mountain laurel, also seen earlier in the year when it was in bloom early summer)
turkey tails (Trametes versicolor) are a common polypore mushroom found in many parts of the world and has been used medicinally in many cultures as well.
Sassafras sapling (Sassafras albidum), a fragrant tree made locally famous for it's use in brewing root beer
Wild Hydrangea (Hydrangea arborescens)
Autumn leaf butterfly competing with paper wasps for the sap of this tree.
the bright beginnings of the unmistakable and edible Chicken of the Woods fungus, also known as sulphur shelf , (Laetiporous sulphureus)
The white spots seen on this young Hemlock tree are a colony of the Hemlock Woolly Adelgid (HMA), which is an invasive insect imported from Asia that has decimated Georgia's Hemlock populations and continues to spread quickly across the state. 

scenic views from the rim trail show the exposed bedrock cliffs 

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