Jan. 29 - 1924, Tuesday, Oracle. Itzanner in a Ford called for me at 8:30 A.M., and are are off for the day to see the Cambrian on the north east side of the Santa Catalina Mts. We go north on the Florence road to Walnut Tree Ranch, 2 miles north of Tucson, and then east to Oracle (37 miles N.E. of Tucson) and east of Oracle pretty 7 miles farther. Here are out a foot of "Pepin-Dance Cambrian. Have the Jepun Cambrian is a series of quartzite ming in thick beds, many of which are clean and white quartzite. All are more or less de- cidedly cross bedded. Finally turning the tip the final 200 - 300 ft. are coarse and fine grained muddy somewhat gray, dirty gelb mit n reddish quartzite that have strangely trilobites. What I saw suggests rather Daulia but Itzanner calls them Archaearia. The whole of this quartzite series may be 1500 ft thick. It is termi- nated by fm. 75 to 100 ft of a purple