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originally posted by: wildespace
Exact coordinates for the "dome" - 23 44 45.53 N, 18 55 38.70 W
Here it is at 2x of original image scale, and with slightly improved contrast:
The image page says that the Sun was approx 45 degrees above the horizon when this image was taken. If this were a sphere or tall dome, it would have left a much bigger shadow.
Actually, at 45 degree Sun angle, an object's shadow on level ground will be just as long as the object is tall. Let's assume, for simplicity, that this "dome" is on level ground. At the original image scale, the shadow is at best 4 pixels long. The image's resolution is 25 cm / pixel, giving us 1 meter.
Thus, this "dome" is only about 1 meter tall. It's just a fairly flat and vaguely round formation, probably of sedimentary nature.
P.S. bonus - a nearly true-colour image of the "dome", albeit at a lower resolution:
The Sun angle for this one was only 25 degrees above the gorizon, which would have left one hell of a shadow if it were a sphere or a dome.
Here, I used the colour from the second image with the higher-rez first image for this composite:
originally posted by: Zarniwoop
I've learned over the years that it is impossible to determine the shape of a rock without at least more than one angle. I've been fooled more than once