<Tr> <Td> 580,000 years </Td> <Td> Kansas </Td> <Td> Angliense </Td> <Td> Regresión </Td> <Td> Regresión </Td> <Td> Kansan Stage </Td> </Tr> <Tr> <Td> 750,000 years </Td> <Td> Aftoniense </Td> <Td> Cromeriense </Td> <Td> Maarifiense </Td> <Td> Siciliense </Td> <Td> Cromerian Complex </Td> </Tr> <Tr> <Td> 1,100,000 years </Td> <Td> Nebraska </Td> <Td> Beestoniense </Td> <Td> Regresión </Td> <Td> Regresión </Td> <Td> Beestonian stage </Td> </Tr> <Tr> <Td> 1,400,000 years </Td> <Td> interglaciar </Td> <Td> Ludhamiense </Td> <Td> Messaudiense </Td> <Td> Calabriense </Td> <Td> Donau - Günz </Td> </Tr>

Where did large number of palaeolithic sites were discovered