may be the way the wind blew? or that that is the way the sand is deposited
Salutations!
What river forms a large portion of the border between the United states and Mexico?
The Rio Grande River forms a large portion of the border between the United States and Mexico. The Rio Grande River is a global river that separates Mexico and the United States. It starts from Colorado, and then dribbles till Gulf of Mexico.
Hope I helped :D
Answer:
<em>A. 6,000 years</em>
Explanation:
Original sample N = 60 g
The half life of N/2 is 3000yrs
"""""""""""""""""""N/4 is 6000yrs
N/4 ===> 15 gram
it takes 6000yrs to decrease to 15grams
