Text and photos provided by Stephen L., of Adirondack Aerial & Ground Imagery Showcase Page
Adirondack Geology on Paradox Lake
While staying at the Paradox Lake State Campground in Paradox NY back in late July. I took a relaxing kayaking paddle on the second day there. It was a nice day and there was hardly any wind or current and not to hot either.
I decided to paddle across Dark Bay and skirt the shore line on the east side not far from the state campground boat launch. I have included a sketch of the path on Google Maps along with some pencil marks in case others would like to see this cool geological outcrop.
While paddling along the shore line, I noticed some Karst topography. What is Karst topography you ask, well for those that have visited the Adirondack attraction at Pottersville NY, known as Natural Stone Bridges and Caves, you have seen it. Karst topography is formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum. It is characterized by underground drainage systems with sinkholes and caves. Adirondack Marble can also exhibit this type of chemical weathering known as carbonation.
So, what is this type of Adirondack Marble or also know geologically as Tectonic Marble Brecca?
As per my source link: https://muse.union.edu/…/kurt…/eastern-adirondacks/
Marble is a rock resulting from metamorphism of sedimentary carbonate rocks, most commonly limestone or dolomite rock. However, this type of marble somewhat differs. This Marble as described in my source link was a “tectonic grease” during Adirondack deformation as a result of mountain building called the Grenville Orogeny. Rocks that were once Limestone were heated and deformed under intense heat and pressure and then thrusted upwards to the Marbles we have today.
Large amounts of deformation (It refers to the process which affects the shape, size, or volume of an area of the crust of the earth. The type of deformation varies from the type of stress and type of rock found in a specific area of the crust of the earth) and shear stress (Shear stress is the stress component parallel to a given surface, such as a fault plane, that results from forces applied parallel to the surface or from remote forces transmitted through the surrounding rock.).
Layers in the Adirondack Marble, volcanic dykes and adjacent rock units were all disrupted and incorporated into this marble creating the unique shapes of amphibolite (a granular metamorphic rock consisting mainly of hornblende and plagioclase) and calc-silicates (A calc–silicate rock is a rock produced by metasomatic alteration of existing rocks in which calcium silicate minerals such as diopside and wollastonite are produced. Calc–silicate skarn or hornfels occur within impure limestone or dolomite strata adjacent to an intruding igneous rock).
This type of Marble I have also encountered in other areas of the Adirondacks including Pottersville, Newcomb and Eagle Lake (Ticonderoga NY).
Again, the location is Paradox Lake in Paradox NY (Severance NY Hamlet).
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