Question

QUESTION 18 1 points Save Answer How old are the rocks found at Henrietta (a town just south of Rochester)? a- 420-440 Ma b. 360-420 Ma Oc. 200-250 Ma d 0-2.5 Ma

Answer 1

correct option is (a) 420-440 Ma

Step-by-step explanation:

as we know that Henrietta town in the Monroe County , United States

and in Henrietta large number of rocks are found and major are Sedimentary and Igneous rocks

and porphyritic in nature ( Basalts and diorite ) also found in the Henrietta and They are subject to absolute dating method

as the results are found to be that the rocks were about 420 - 440 million years old

so correct option is (a) 420-440 Ma