Table 2.
Isotopic Data for Volcanic Glasses Cyprus and Stonyford Volcanics
| Clean* | Altered* | |||
|---|---|---|---|---|
| Sample | δ15Nair | N (ppm) | δ15Nair | N (ppm) |
| CYP-01 | −1.8 | 2.4 | +1.8 | 5.8 |
| HYAL-02 | −7.3 | 2 | −5.3 | 4.8 |
| CYP-03 | 4.3 | 11.6 | +6.1 | 53 |
| CYP-04 | 5.5 | 13.5 | +7 | 49 |
| CYP-05 | 4.5 | 9 | +1.4 | 9.2 |
| CYP-009 | −3.8 | 9.7 | −1.5 | 8.4 |
| CYP-011 | 0.4 | 5.7 | −2.5 | 6.9 |
| SFV-G2 | −7.2 | 22 | −2.6 | 30 |
| SFV-G3 | −5.4 | 33 | −3 | 45 |
| SFV-G4 | −6.7 | 18.8 | −6.3 | 28 |
| SFV-G5 | −3.9 | 18 | −4.3 | 13 |
| SFV-G8 | −4.7 | 3.5 | −5.7 | 16 |
*
As deduced by examination under a microscope, based on the abundance of brownish, palagonitized glass.