Oella_Formation

Oella Formation

Oella Formation

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The Oella Formation is a Late Proterozoic or early Cambrian schist in Howard and Baltimore Counties, Maryland. It is described as "Medium-grained biotite-plagioclase-muscovite-quartz schist, locally garnetiferous, interlayered on a centimeter to decimeter scale with fine-grained biotite-plagioclase-quartz gneiss, commonly bearing muscovite but less commonly garnet."[2]

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Type locality

The type locality is along the Patapsco River at Oella, southwest Baltimore County.[1]

See also

References

  1. [1]
    Crowley, W.P., Reinhardt, Juergen, and Cleaves, E.T., 1976, Geologic map of the White Marsh quadrangle, Maryland: Maryland Geological Survey, Quadrangle Geologic Map QA-4, scale 1:24,000. (online)
  2. [2]
    Crowley, W.P. and Reinhardt, Juergen, 1980, Geologic map of the Ellicott City quadrangle, Maryland: Maryland Geological Survey, scale 1:24,000. (online)
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