-
Ordovician geological formation. It
belongs to the
Chazyan stage of the
Champlainian series in
North American regional stratigraphy,
equivalent to the late...
- mesopores. Bork,
Kennard B.; Perry, T.G. (1968). "Bryozoa (Ectoprocta) of
Champlainian Age (Middle Ordovician) from
Northwestern Illinois and
Adjacent Parts...
- Database. Bork,
Kennard B.; Perry, T.G. (1968). "Bryozoa (Ectoprocta) of
Champlainian Age (Middle Ordovician) from
Northwestern Illinois and
Adjacent Parts...
-
Peter Sandstone is an
Ordovician formation in the
Chazyan stage of the
Champlainian series. This
layer runs east–west from
Illinois to
South Dakota. The...
- 2022. Bork,
Kennard B.; Perry, T.G. (1968). "Bryozoa (Ectoprocta) of
Champlainian Age (Middle Ordovician) from
Northwestern Illinois and
Adjacent Parts...
- 29. Bork,
Kennard B.; Perry, T.G. (1968). "Bryozoa (Ectoprocta) of
Champlainian Age (Middle Ordovician) from
Northwestern Illinois and
Adjacent Parts...
- by an unconformity; from
oldest to youngest,
these are the Canadian,
Champlainian, and
Cincinnatian series.
Ordovician features in
Illinois include the...
- Australia, Canada, France,
United States. Ross, June
Philips (1969). "
Champlainian (Ordovician)
Ectoprocta (Bryozoa), New York State, Part II". Journal...
- 2015 Bork,
Kennard B.; Perry, T.G. (1968). "Bryozoa (Ectoprocta) of
Champlainian Age (Middle Ordovician) from
Northwestern Illinois and
Adjacent Parts...
- 1093. Bork,
Kennard B.; Perry, T.G. (1968). "Bryozoa (Ectoprocta) of
Champlainian Age (Middle Ordovician) from
Northwestern Illinois and
Adjacent Parts...
