 Fossils have been found in the upper Oldman Formation and lower Dinosaur Park Formation of Canada . The Oldman Formation dates to the Campanian , about 77 @.@ 5 to 76 @.@ 5 million years ago , and the Dinosaur Park Formation dates from 76 @.@ 6 to 74 @.@ 8 million years ago . Corythosaurus lived from ~ 77 – 75 @.@ 7 million years ago . In the Dinosaur Park Formation C. casuarius lived from 76 @.@ 6 to 75 @.@ 9 mya , with C. intermedius living from 75 @.@ 8 to 75 @.@ 7 mya . In the Oldman Formation C. casuarius , the only species of Corythosaurus from the deposits , lived about 77 to 76 @.@ 5 mya . The holotype specimen was clearly a carcass that had floated up on a beach , as Unio shells , water @-@ worn bones , and a baenid turtle were preserved all around . Corythosaurus probably lived in a woodland forest , and might have occasionally wandered into swampy areas . 
 Fossils <a href='been_done' title='1'><mark>have</mark></a> been found in the upper Oldman Formation and lower Dinosaur Park Formation of Canada . The Oldman Formation <a href='uninflect' title='2'><mark>dates</mark></a> to the Campanian , about 77 @.@ 5 to 76 @.@ 5 million years ago , and the Dinosaur Park Formation <a href='uninflect' title='3'><mark>dates</mark></a> from 76 @.@ 6 to 74 @.@ 8 million years ago . Corythosaurus<a href='been_done' title='4'><mark></mark></a> lived from ~ 77 – 75 @.@ 7 million years ago . In the Dinosaur Park Formation C. casuarius lived from 76 @.@ 6 to 75 @.@ 9 mya , with C. intermedius living from 75 @.@ 8 to 75 @.@ 7 mya . In the Oldman Formation C. casuarius , the only species of Corythosaurus from the deposits , lived about 77 to 76 @.@ 5 mya . The holotype specimen was clearly a carcass <a href='null_relcl' title='5'><mark>that</mark></a><a href='been_done' title='6'><mark>had</mark></a> floated up on a beach , as Unio shells , water @-@ worn bones , and a baenid turtle <a href='uninflect' title='7'><mark>were</mark></a> preserved all around . Corythosaurus probably lived in a woodland forest , and might <a href='been_done' title='8'><mark>have</mark></a> occasionally wandered into swampy areas . 
Fossils done been found in the upper Oldman Formation and lower Dinosaur Park Formation of Canada . The Oldman Formation date to da Campanian , abt 77 @.@ 5 to 76 @.@ 5 million years ago , and the Dinosaur Park Formation date from 76 @.@ 6 to 74 @.@ 8 million years ago . Corythosaurus been lived from ~ 77 – 75 @.@ 7 million yrs ago . In tdaDinosaur Park Formation C. casuarius lived from 76 @.@ 6 to 75 @.@ 9 mya , with C. intermedius living from 75 @.@ 8 to 75 @.@ 7 mya . In the Oldman Formation C. casuarius , thdanly species of Corythosaurus from the deposits , lived about 77 to 76 @.@ 5 mya . Thedalotype specimen was clearly a carcass done floated up on a beach , as Unio shells , water @-@ worn bones , and a baenid turtle was preserved all around . Corythosaurus probably lived in a woodland forest , and mite done occasionally wandered into swampy areas .