Volcano of classifying magmatic volcanoes is by their frequency of eruption, with those that erupt regularly called active, those that have erupted in historical times but are now quiet called dormant or inactive, and those that have not erupted in historical times called extinct. However, these popular classifications—extinct in particular—are practically meaningless to scientists. They use classifications which refer to a particular volcano's formative and eruptive processes and resulting shapes. There is no consensus among volcanologists on how to define an "active" volcano. The lifespan of a volcano can vary from months to several million years, making such a distinction sometimes
Dormant Commerce Clause 7-8 (1st Cir. 1992), the First Circuit held that the dormant Commerce Clause applies to Puerto Rico. Dormant Commerce Clause The Dormant Commerce Clause, or Negative Commerce Clause, in American constitutional law, is a legal doctrine that courts in the United States have inferred from the Commerce Clause in Article I of the US Constitution. The Dormant Commerce Clause is used to prohibit state legislation that discriminates against interstate or international commerce. For example, it is lawful for Michigan to require food labels that specifically identify certain animal parts, if they are present in the product, because the state law