original: from about 200 to 30 million years ago , the north american plate was in continual collision with the farallon plate .
simplifications: from about 200 to 30 million years ago , the north american plate was constantly colliding with the farallon plate . millions of years ago , the north american plate was always hitting the farallon plate . from about 200 to 30 million 1 years ago , the north american plate was in going on all the time hard coming-together with the farallon plate . from about 200 to 30 million years ago , the north american plate was in continual collision with the farallon plate . since 200 to 30 million years ago , the north american plate has been colliding with the farallon plate . 30 million years ago , the north american plate was in continual collision with the farallon plate . from about 200 to 30 million years ago , the north american plate was in going on all the time hard coming-together with the farallon plate . from about 200 to 30 million years ago , the north american plate was in constant contact with the farallon plate .