Table 1 Geological properties of the rock masses.

From: Re-evaluation of excavation class limits for underground excavations based on new data

Code

Researchers

Location

Formation

Age

Lithology

Max. Overburden (m)

1

Gurocak et al.26

Eastern Turkey

Yamadag Volcanics

Middle-Late Miocene

Basalt

50

2

Tuffite

25

3

Gurocak et al.18

Eastern Turkey

Ispendere Ophiolities

Late Jurassic

Late Cretaceous

Diabase

78

4

Gurocak and Yalcin21

Eastern Turkey

Komurhan Ophiolities

Late Cretaceous

Gabbro

150

5

Alemdag et al.27

Northern Turkey

Caglayan Formation

Late Cretaceous

Basalt

100

6

Tuffite

40

7

Erdem28

Eastern Turkey

Malatya Volcanics

Middle-Late Miocene

Basalt

170

8

Dacite

55

9

Agglomerate

100

10

Tuffite

100

11

Hekimhan Formation

Late Cretaceous

Shale

120

12

Alibonca Formation

Early Miocene

Marl

110

13

Limestone

110

14

Kanik and Gurocak29

Northern Turkey

Esiroglu Formation

Late Cretaceous

Pyroclastic

50

15

Kackar Rhyodacite

Tonalite

150

16

Catak Formation

Shale

250