Nikon D750
Nikkor 16-35 mm f/4
Tripod N-1204SK and ball head K30X from Sirui.
NiSi CPL, 10 stops ND and 3 stops soft GND filters

Camera data:
Shutter Speed: one frame of 120 sec. for the sky and another frame of 1/3 sec. for the foreground
Aperture: f/11
Focal Length: 16mm
ISO Speed: 100

Edition:
Adjusted white balance, increased saturation and contrast, a bit of sharpening and recovered info from the darkest areas in Lightroom. I combined two different frames, one focused to the infinity and one focusing in the foreground; alsoenhanced a bit the colors in PS.

https://www.deviantart.com/marcosrodriguez/art/pebbles-879381460