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Geophysicist Frederick John Vine and the Canadian geologist Lawrence W. Morley independently realized that if the seafloor spreading theory was correct , then the rocks surrounding the mid-oceanic ridges should show symmetric patterns of magnetization reversals , a record of the Earth 's geomagnetic reversals , captured in the cooling volcanic rocks .
 Frederick John Vine, Lawrence W. Morley
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Frederick John Vine, Lawrence W. Morley