The La Cloche Mountains in Killarney located in the Canadian Shield are
a large range of hills composed primarily of white quartzite--a
metamorphic rock converted from Sandstone through heating and pressure of
tectonic compression.
The ore deposits in Sudbury are part of a large geological structure
known as the Sudbury Basin, believed to be the remnants of a 1.85-billion
year old meteorite impact crater. Due to Sudbury's nickel mines, local
lakes were damaged by acid rain causing many of Killarney's lakes to
become acidified, resulting in the loss of fish species and aquatic plant
life - especially severe in the quartzite areas. Legislation in 1970s
forced the industry to improve its sulphur emission standards to be
reduced by over 90 percent.
Science and Society: A solitary loon purposely signifies the return of a
healthier biological ecosystem that was nearly eradicated through
environmental change--which through time--environmental change all play
significant roles in the history of life.
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