Cache is NOT at posted coordinates, you must solve the puzzle below to find the true coordinates.
This area use to be home of a four-stage puzzle by the Puzzle Master Zgrav, this should be a little easier.
Cache is only available between Sunrise and Sunset.
You can find the cache at N 38 AB.CDE W 077 FG.HIJ.
A = √ (Violet * Yellow + Green)
B = ∛ (Red + Violet)
C = √ (Green + Blue)
D= (Yellow² - Orange)
E = ((Blue + Orange) - (Violet - Red))
F = (Green² - (Yellow² + Violet))
G = ((Indigo * Yellow) - (Yellow + Blue + Green))
H = ∜ (IndigoBlueIndigoRed)
I = ((Yellow * Indigo * Blue) / (Orange * Blue * Yellow))
J = (Orange * Green - Blue)

You can validate your puzzle solution with certitude.