At the constitutional convention delegates from northern and southern states disagreed about whether

Slave Trade Compromise

Those who opposed slavery in the Northern states wanted to bring an end to the importation and sale of slaves. This was in direct opposition to the Southern states, which felt that slavery was vital to their economy and did not want the government interfering in the slave trade.

Explanation:

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mount st. helens in washington erupts, causing a massive avalanche and killing 57 people on this day in 1980. ash from the volcanic eruption fell as far away as minnesota. seismic activity at mount st. helens, which is 96 miles south of seattle, began on march 16.