How to pronounce “marked up” in English

my co-author Robert Chini and a number of his colleagues uh thought that this is how people might react so with permission of the uh the PetrifiedForest National Park they actually went into the park and marked up a a bunch of uh pieces of petrified wood that weren'treally part of the park they went to paths they put all sorts of pieces of of petrified wood along the