The Pleistocene of North America: and its vertebrated animals from the states east of the Mississippi River and from the Canadian provinces east of longitude 95°Hay, Oliver Perry
Science
The Pleistocene of North America: and its vertebrated animals from the states east of the Mississippi River and from the Canadian provinces east of longitude 95°
Hay, Oliver Perry
Paleontology -- North America; Paleontology -- Pleistocene; Vertebrates, Fossil
1. _Jackson County._—In 1863 (Canad. Naturalist and Geologist, vol.
VIII, p. 399), Alexander Winchell described an elephant tooth (No.
3163), found in this county. This is now in the collection at the
University of Michigan, labeled _Elephas jacksoni_. The writer regards
it as belonging to _E. columbi_. It is the much-worn hindermost tooth of
the left side of the lower jaw. There are present 17 plates, and about 7
are missing from the front end. Above the bases of the rear plates are
only 5 in a 100–mm. line; on the worn face are 7 plates in this
distance. The anterior plates lean backward with respect to the base,
while the hinder ones lean forward. The plates are more or less bent
between base and apex. The Kalamazoo morainic system crosses the middle
of Jackson County, running east and west.
In 1861 (1st Bien. Rep. Geol. Surv. Michigan, p. 132), Professor
Winchell mentioned this tooth and stated that it had been found in the
northern part of the county while a ditch was being made. The locality
is, therefore, north of the moraine referred to above.
INDIANA.
(Map 12.)
1. _Terre Haute, Vigo County._—In the State Museum at Indianapolis is a
fine lower left molar of _E. columbi_, labeled as found, in 1896, near
Terre Haute, on the farm of Aaron Conover, and presented by Earl
Conover. Mr. Herbert C. Anderson, county surveyor of Vigo County,
informed the writer that the farm is located in the southwest quarter of
section 9, township 12 north, range 9 west. This is 3.5 miles north of
Terre Haute. The place is near Wabash River and the deposit is probably
outwash from one of the ice-sheets. The depth at which the tooth was
found is given as 18 feet. The length from the top of the anterior plate
to the base of the hindermost is 380 mm.; width of worn face 100 mm. The
hinder plates lean strongly toward the front and there are 6 plates in
100 mm.
2. _Monrovia, Morgan County._—The collection of the State Museum at
Indianapolis contains the hinder half of what appears to be the lower
right last molar. This was presented January 10, 1911, by David Hobson,
of Monrovia, Indiana, and is labeled as found 1.5 miles southeast of
Monrovia, in a gravel bar in Sycamore Creek. There are present 13
plates, considerably flexed as they rise from base to summit.
According to Leverett’s glacial map of Indiana, Monrovia is situated on
the northern edge of the Shelbyville moraine. The tooth seems to have
been found in Sycamore Creek, on the moraine or near its southern
border, not far from the northern border of the Illinoian drift area.
While the possessor of this tooth probably lived during some period of
the Wisconsin stage, it is possible that the tooth had been washed out
of some deposit of the Illinoian or of some interglacial deposit laid
down between the Illinoian and the Wisconsin stages.
Public-domain text, read in full here on John Shaqi.
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