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February 13, 1855 -
Part of OCEANA reverted to non-county status as Non-County Area 7; Non-County Area 7 was attached to OTTAWA for judicial purposes.
(Mich. Acts 1855, reg. sess., no. 171, secs. 1-3/pp. 423-424)
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April 01, 1840 -
February 13, 1855
OCEANA gained from MICHILIMACKINAC (now MACKINAC), lost to KENT, and lost to creation of MECOSTA and NEWAYGO.
(Mich. Acts 1840, ann. sess., no. 119, secs. 1-4, 33-35/pp. 196, 200)
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March 02, 1831 -
April 01, 1840
OCEANA created by Michigan Territory from MICHILIMACKINAC (now MACKINAC).
(Mich. Terr. Laws, 3:sec. 8/p. 872)
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