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Tyrka
is a
creek
in
Frýdek-Místek District
,
Moravian-Silesian Region
,
Czech Republic
, in the
historical region
of
Cieszyn Silesia
.
It is a
left tributary
of the
Olza River
, to which it enters in
Třinec
. It originates in the
Moravian-Silesian Beskids
in the
elevation
of
835
m and
flows
generally
northward
through the
villages
of
Tyra
and
Oldřichovice
. Tyrka also flows through the
territory
of the
Třinec Iron and Steel Works
before joining
Olza
.