59 
DINOSAUR TRACKS FROM PEACE RIVER, BRITISH COLUMBIA 
By C. M. Sternberg 
CONTENTS 
Page 
Introduction 59 
Age and environment . . 60 
Systematic descriptions 61 
Illustrations 
Plate I. Trackways of Irenesauripus mclearni 77 
II. Irenesauripus mclearni 79 
III. 1. Irenesauripus occidentalis 81 
2. Irenesauripus acutus 81 
3. Columbosauripus ungulalus 81 
IV. 1. Gypsichnites paccnsis 83 
2. Cast of Amblydactylus gethingi 83 
V. 1. Trackwaj's of Tetrapodosaurus borealis 85 
2. Cast of Tetrapodosaurus borealis 85 
Figure 1. Irenesauripus mclearni 63 
2. Irenesauripus aculus 64 
3. Irenesauripus occidentalis 66 
4. Columbosauripus ungulalus 67 
5. Irenichnites gracilis 69 
6. Gypsichnites pacensis 70 
7. Gypsichnites pacensis 71 
8. Amblydactylus gethingi 73 
9. Tetropodosaurus borealis 75 
INTRODUCTION 
The first dinosaur track to be observed in North America, and probably 
the first observed anywhere, was ploughed up by Pliny Moody, near South 
Hadley, Mass., in 1800. 1 Dinosaurs were unknown at that time and 
young Moody regarded the impression as representing the track of Noah’s 
raven. The earliest scientific description of dinosaur tracks in North 
America was published by Prof. Edward Hitchcock, in 1836 2 , when he 
described and figured a number of imprints from Trlassic rocks of the 
Connecticut valley, as Ornithichnites or stony bird tracks. The first 
discovery of Canadian dinosaur tracks was made in 1922, in Peace River 
canyon, B.C., by F. H. McLearn, and was mentioned by him in the Sum- 
mary Report of the Geological Survey, Canada, for that year (part B, 
page 5). These aie the most northerly dinosaur tracks known to the 
writer. The only dinosaur tracks in Canada that have been fully described 
are from the Edmonton formation of Alberta, described by the writer 3 as 
Ornithomimipus angustus. 
’The Hitchcock Lecture upon Ichnology by N. M. Grier, Am. Mid. Nat., vol. X, No. 7. 
3 Am. Jour. Sci. and Arts, vol, 29, pp. 3 0 7-340 (1836). 
8 Sternberg, C. M.: Geol. Surv., Canada, Bull. 44, pp. 85-87, PI. XVIII. 
*5922—41 
