The first major transgression onto the North American continent ...

[DyllonKazuo]

The first major transgression onto the North American continent is recorded in rocks of the
  ___________________ _ sequence. Fill in the blank(s) with the appropriate word(s).

Question 2

The ___________________ _ orogeny in Europe is a mirror of the Taconic and Acadian orogenies in
  North America. Fill in the blank(s) with the appropriate word(s).

[emilymalinowski12]

Answer to Question 1

Sauk

Answer to Question 2

Caledonian

[DyllonKazuo]

Great answer, keep it coming

[Joy Chen]

Thanks for the timely response, appreciate it