Sunday March 12, 1922 Set off early and at 8.25 down on the Santa Fe to Fort Worth and the by truly to Dallas. The day is bright and cool. The Canadian river at Purcell is a very wide (1/2 tr 1 mile wide) and very shallow (probably less than 10 foot) fine muddy sand stream. Sands much puffed by water and wind. Some of the puffles made in a few inches of water are irregular hexagonal affairs with diameter of 6 to 8 inches, suggesting sun-cracking in appearance. The Canadian river reminds of the lower portion of the Platte. About 2 miles south of Davis on the Santa Fe one begins to enter the Cerro Gordo and the north slopes of the ridges are covered by coarse brittle limestone dipping to the south. Some hundreds of feet thick. Then is ended Paleozoic strata - thrust an anticline into a wide flat valley, south of Reyford. In this oval valley are the strata are Ordovician.