REPORT OF THE CHIEF ASTRONOMER 1 487 



SESSIONAL PAPER No. 25a 



Fossils : plants only ; determined by Professor Penhallow as : 



Cfleicheni-a gilbert-thompsoni Font. 



Glyptostrobus sp. 



Pinus sp. 



Salix sp. 

 Horizon: Cretaceous of Shasta series; see Appendix B. 



No. 1430. At 4,200-foot contour, east side of Chuchuwanten creek canyon, 

 about 400 yards north of Boundary slash. 



Stratigraphic position: about 900 feet below top of member B. Shale bands 

 in sandstone. 



Fossils: plants only; determined by Professor Penhallow as: 



Cladophlebis slcagitensis, n. sp. 



Gleichenia sp. 



Aspidium frederichsburgense, Font. 



Nilsonia pasaytensis, n. sp. 



C'yaadites •unjiga, Dn. 



Populus cyclophylla, Heer. 



Myrica serrata, n. sp. 



Quercu-s flexuojsa, Newb ( ?) 



Quercus coriacea, jSTewb. 



Sassafras cretaceum, Newb. 



Dorstenia (?) sp. 

 Horizon: Professor Penhallow writes: 



'Reviewing this evidence, we observe that there are eleven species of 

 plants from locality 1430. Of these Dorstenia (?), which is of questionable 

 character, and Pinus (sic), which is chiefly represented by seeds and may 

 indicate any one of several horizons, need to be eliminated because not 

 specifically defined. This leaves nine well-defined species, of which three are 

 definitely Lower Cretaceous and six as definitely Upper Cretaceous.' 

 He concludes that this flora shows two well defined horizons within the 

 Shasta-Chico series. See Appendix B. 



Nos. 1432-33-34. 4,700-foot contour, north side of Castle creek valley, four 

 miles down stream from crossing of that stream and the Boundary line; just 

 east of conspicuous band of thick conglomerate, member J. 



Stratigraphic position : about 300 feet below top of member E. 



Fossils : plants, determined by Professor Penhallow ; animals, determined 

 by Dr. T. W. Stanton. 



Plants : ' The only specimen under number 1433 showed on one side, 



two small fragments of leaves which, from their obviously parallel venation, 



are to be regarded as belonging to some endogenous plant, the nature of 



which could not be determined. On the opposite side of 1433 is a single 



leaf of a pine.' See Appendix B. 



