Natural Hill

View of a cone-shaped hill topped with fir trees in the Tucumcari Valley. The author mentions it as follows:^[1]

This valley also possesses a very curious pyramid 510 feet in height; it is formed of twelve horizontal beds of lime, of sandstone, and of white, yellow, grey, green, and red marl. The superior strata of this pyramid of Jurassic formation contain numerous fossils, amongst which may be remarked the Gryphsea Tucumcarii, which is a new species or a variety of the Gryphsea Pitcheri. Besides this pyramid, which is surmounted by two turrets, and whose basis is ornamented with a multitude of counterforts in marl of different colours, there are also to be seen, in the same valley, rocks of gritstone resembling towers or fortresses of the mediaeval ages, Gothic castles, cathedrals in nuns, minarets, broken columns, or even enormous vases, that look as if they had been fabricated by giants.

The caption reads in the French edition: Montagne-pyramide.