article_snippet.sent: The mass, which has risen some 30 to 50ft above sea level,  measures roughly 1,000- 1,640ft long, and 100ft wide, a town official said.
article_snippet.sent: The mass, which has risen some 50ft above sea level, measures roughly 1,000- 1,640ft long, and 100ft wide .
highlights_snippet.sent: A 1,000ft stretch of land rose up above sea level on Japanese island .
  
highlights_snippet.sent: The 100ft wide mass on Hokkaido is now some 30 to 50ft above sea level .
  