diller.] FLUVIO-ESTUARINE DEPOSITS. 43 
is doubtful, for it may be only extreme Upper Miocene. It is mainly a Miocene 
species, occurring abundantly in many parts of the world, but has also been 
reported from the Oligocene or even a little lower, in the Eocene. Theoretically it 
should be found in the Pliocene as well as Pleistocene somewhere, as it is but 
Slightly different from the living Taxodium distichum, our well-known cypress. 
Plant beds in these formations (Pliocene and Pleistocene) are extremely rare. 
Concerning the fossils collected for the writer by Mr. Storrs at 
Hyampom, in June, 11)01, Dr. Knowlton reports, December 3, 1901, 
as follows: 
This collection consists of about 25 pieces of thin, yellowish white matrix, in 
which are preserved apparently four species of fossil plants, as follows: Sequoia 
dngustifolia Lesq., Sequoia langsdorfii (Brgt.) Heer., Salix sp. (large lanceolate, 
serrate leaf), Salix sp. (small ovate-lanceolate, entire-margined leaves). The 
first of these leaves (Sequoia angusti folia) was originally described by Lesque- 
reux from Elko, Nev.. and has since been found at Corral Hollow. Cal., and in 
the Payette formation near Marsh post-office, Idaho. The specimens from 
Hyampom are absolutely the same as those from Corral Hollow, and should be 
Upper Miocene in age. 
There is only a single example with its counterpart that is referred to Sequoia 
langsdorfii. This is exactly similar to numerous specimens from the Mascall beds 
of the John Day Basin, Oregon. It is a species widely distributed throughout the 
Tertiary, but is perhaps most abundant in the Miocene. 
The species of Salix do not appear to be described, but they are not greatly 
unlike well-known forms from the Miocene. 
We therefore seem warranted in placing the beds containing this little flora in 
the Upper Miocene 
AT HAY FORK. 
Sediments similar to those of Hyampom, locally' associated with 
coal, occur farther up Hay Fork, near the town of Hay Fork. 
According to Mr. Hershey's preliminary map they extend for 10 
miles nearly east and west, with a width of about a mile. In these 
deposits, at a point about 3 miles down the creek from the town of 
Hay Fork, Mr. Storrs found the sandstones and shales striking N. 
10° W. and dipping 35° NE. He collected a number of fossil leaves, 
among which Mr. F. A. Lucas recognizes some sharks' teeth, and 
remarks that — 
They appear to belong to the genus Lamina; more than that it is impossible to 
say. and this throws little light on the age of the stratum in which they occur, as 
the genus has a considerable range in time and space. However, they are salt- 
water species, but liable to occur at the mouth of rivers. I have never seen 
sh arks' teeth so much flattened as these, particularly in view of the soft character 
61 the matrix. 
This is an especially important discovery, for it fixes the level at 
which the deposits originated at about sea level. 
Concerning the leaves, Dr. Knowlton says: 
This collection consists of some twenty or more pieces of matrix, hard and 
coarse grained, on which the plants are very poorly preserved. A number of 
species are evidently present, but owing to the poor state of preservation it is 
