<span>The pacific plate is moving very slowly and as it does, some of the thermal vents are closed over until a new weak spot in the Earths crust moves over the magma chamber, allowing for it to break through when enough pressure build up.</span>
<span>Senator Joseph McCarthy</span>
Answer:
Hundreds of gold-seekers died and were buried along the trail. The strain took a toll on the oxen and mules as well. As they traveled, forty-niners lightened the load by throwing out everything they didn't need--from cookstoves and furniture to barrels of flour.
Answer:
The Mississippi River made it difficult.
