This question has bothered me on and off over the years - typically around this time as we read this perek on the first day of Sukkot as the haftarah:
וְעָמְד֣וּ רַגְלָ֣יו בַּיּוֹם־הַ֠הוּא עַל־הַ֨ר הַזֵּתִ֜ים אֲשֶׁ֨ר עַל־פְּנֵ֥י יְרוּשָׁלִַם֮ מִקֶּדֶם֒ וְנִבְקַע֩ הַ֨ר הַזֵּיתִ֤ים מֵֽחֶצְיוֹ֙ מִזְרָ֣חָה וָיָ֔מָּה גֵּ֖יא גְּדוֹלָ֣ה מְאֹ֑ד וּמָ֨שׁ חֲצִ֥י הָהָ֛ר צָפ֖וֹנָה וְחֶצְיוֹ־נֶֽגְבָּה׃
On that day, He will set His feet on the Mount of Olives, near Jerusalem on the east; and the Mount of Olives shall split across from east to west, and one part of the Mount shall shift to the north and the other to the south, a huge gorge.
My question (several, actually) is: if this nevuah is to be taken at face value what will happen to those buried on Har haZeisim when this dramatic cleaving occurs? Again, if this is the literal understanding of the verse (and my impression from the commentaries is such that it is) then when and who allowed the usage of Har haZeisim as a burial place at all?
If anyone has insights or better yet references with whom to consult I'd greatly appreciate it.