Figure 12
From: The restoration and erection of the world’s first elevated obelisk

SEM and petrography of a fallen sample from the obelisk. (a) interpretation on SEM photo. (b) interpretation on petrography photo.
From: The restoration and erection of the world’s first elevated obelisk

SEM and petrography of a fallen sample from the obelisk. (a) interpretation on SEM photo. (b) interpretation on petrography photo.