MarvelousCraft_1.5.1.zip is a release file of the Minecraft resource pack Marvelouscraft 64x, made for Minecraft 1.7.2. It was published on November 29, 2013 and is 20.8 MB in size. For the full description, screenshots and every other version, visit the Marvelouscraft 64x resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.