The one place on Earth where mid-oceanic ridge volcanism occurs ...

[charchew]

The one place on Earth where mid-oceanic ridge volcanism occurs above sea level is
  ___________________ _. Fill in the blank(s) with the appropriate word(s).

Question 2

The most volcanically active region of the contiguous United States is the ___________________ _. Fill in the blank(s) with the appropriate word(s).

[Galvarado142]

Answer to Question 1

Iceland

Answer to Question 2

Cascade Range

[charchew]

Great answer, keep it coming

[mochi09]

Thanks for the timely response, appreciate it