
Figure 1
Sampling locations of Maiolica Fm cherts. The sampled deposits are located in Abruzzo, Lazio and Umbria regions (central Italy).
Table 1
Output of the sampling activity discussed in this work.
| GPS POINT | SOURCE | TYPE | COORDINATES X, Y | N°OF SAMPLES |
|---|---|---|---|---|
| CAT01 | Primary | Outcrop | 31.2095, 48.14858 | 17 |
| MF03 | Primary | Outcrop | 38.6822, 47.33435 | 15 |
| MP01 | Primary | Outcrop | 32.3676, 46.63448 | 15 |
| MTM01 | Primary | Outcrop | 30.2502, 47.23405 | 19 |
| SP01 | Primary | Outcrop | 32.1830, 47.42846 | 15 |
| TER01 | Primary | Outcrop | 32.2519, 47.25351 | 16 |

Figure 2
Chert outcrops: 1. MP01; 2. TER01; 3. MTM01; 4. SP01; 5. CAT01.

Figure 3
Detail of the MF03 outcrop (Abruzzo region). Grey chert nodules exposed at the surface are highlighted in red; the red arrow indicates the negative imprint left by eroded chert nodules.
