<Tr> <Td> <Ul> <Li> Mountains </Li> <Li> Peninsula </Li> </Ul> </Td> </Tr> <Ul> <Li> Mountains </Li> <Li> Peninsula </Li> </Ul> <Tr> <Th> Viking Age </Th> </Tr> <Tr> <Td> <Ul> <Li> Old Norse </Li> <Li> Vikings </Li> <Li> Viking art </Li> <Li> Mythology </Li> </Ul> </Td> </Tr>

The appalachian and scandinavian mountains formed when which supercontinent was assembled