with the exception of lacking the broad intense band 
which obscures the region between 8 and 1] (1250 and 
990 cm-!) in the Harrisonville sample. It also may well 
be due to inorganic impurities (silicates) which are 
characteristic of the Kuropean siegburgite. 
Canadian Amber 
Tyrrell (1890) investigated the occurrence of amber 
associated with fragments of decayed wood on the beach 
around the southwestern margin of Cedar Lake, near the 
mouth of the Saskatchewan River, Manitoba, Canada. 
He reported abundant amber along the beach for a mile, 
ina band thirty feet wide with a minimum depth of two 
feet. He further estimated that this deposit contained 
1,437,280 (!) pounds of amber. He also discovered amber 
occurring less extensively on shores of other lakes north 
and east of Cedar Lake. Because the amber has been 
deposited secondarily, the geologic age is uncertain. As 
Carpenter et al. (1988) indicated, however, Cedar Lake 
is fed by an easterly flowing river that drains through 
lignitic beds of Jate Cretaceous age in Alberta and south 
Saskatchewan. Thus, other amber-bearing deposits from 
which Cedar Lake amber could have originated are not 
evident. Carpenter et a/. point out that the insect in- 
clusions also provide support for a Cretaceous age. Evi- 
dence for a more specific time during the long Cretaceous 
interval, however, is not available. 
Although it cannot be definitely related to the Cedar 
Lake deposits, amber with insects found recently at 
Medicine Hat, Alberta (Richards, 1966), is of some in- 
terest in regard to the Manitoban material. ‘The Medi- 
cine Hat amber is associated with lignitic deposits from 
the Foremost Formation (Belly River Series, Upper 
Cretaceous). The Belly River Series falls within the 
Campanian Stage, as K/Ar dates for the Bearpaw shales 
[ 87 ] 
