Raymond Usbal
Raymond Usbal asked Randy Alcorn:

Dear Mr. Alcorn, thank you for writing Heaven. "... And the sea was also gone" (Rev 21:1 NLT), and God called the dry land Earth, and the waters that were gathered together he called Seas. (Gen 1:10 ESV) We know that God created the Seas which is good. That the sea was gone 21:1 can be understood to be referring to the first sea that is part of the first earth, and not on the new earth. What do you think?

Randy Alcorn Hi Raymond,
This is Shauna and I help Randy answer questions!
Thanks for writing in.
Randy writes about this question in this blog post: http://www.epm.org/resources/2010/Mar...
Basically, he believes that there could be large bodies of water on the New Earth, and he gives some explanation of what "sea" meant to the audience of the book of Revelation.
He also talks about this in his Heaven book on pages 273-275. Hope this is helpful!

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