Forest
Oil
did
not
specify
the
manner
of
Clark’s
exit
from
the
company,
whose
stock
price
has
plunged
more
than
50%
since
January.
Clark
had
helmed
the
Denver,
Colorado-based
explorer
for
the
past
nine
years.
The
company,
valued
at
roughly
$745
million,
has
lost
more
than
two-thirds
of
its
market
value
in
the
last
year.
Shares
fell
by
1.8%
to
$6.34
early
on
Friday
on
the
New
York
Stock
Exchange.
Patrick
McDonald,
55,
a
director
at
the
independent
since
2004,
takes
over
immediately
while
a
replacement
is
found
using
executive
search
firm
Spencer
Stuart,
the
explorer
said.
McDonald
has
asked
not…