From my undergratuate days in geology... it has happened many time... the reversal is recorded in the seafloor of the atlantic ocean... as it is spreding from the middle... the new sentiments record polarity... and it has recorded multiple switches.... at least during the widening of the Atlantic...
>>>Better wording....
From my undergratuate days in geology... it has happened many a time... the reversal is recorded in the seafloor bedrock of the Atlantic ocean... as it is spreading from the middle... the new multen rock records the current polarity (in the magnetic particles) as they cool to rock... the reversal has beeb recorded multiple times.... at least during the widening of the Atlantic...