Hudson River Palisade Rockslide
May 30, 2012
Photographer: Michael J Passow; Michael's rockslide photos web page
Summary Author: Michael J Passow
I noticed this impressive rockslide while kayaking near the Palisades of the Hudson River on May 19, 2012. A huge slab of the Triassic intrusion of the Palisade diabase (also known as tap rock) broke off these prominent cliffs (over 300 ft or 90 m high in places) several days before this picture was snapped. The largest blocks are over 10 ft (3 m) long. Chunks of river mud were thrown up as the slide entered the Hudson River. This mud contains small shells and is an excellent example of how fossiliferous shale might have formed.
Photo details: Camera Maker: OLYMPUS IMAGING CORP.; Camera Model: uT6000,ST6000; Focal Length: 5mm (35mm equivalent: 28mm); Aperture: f/5.0; Exposure Time: 0.0031 s (1/320); ISO equiv: 50; Exposure Bias: none; Metering Mode: Matrix; Exposure: program (Auto); White Balance: Auto; Flash Fired: No (enforced); Color Space: sRGB.