Figure 1.
(A) Map of the Baltic Sea with marked Kołobrzeg location. (B) A site on the Kołobrzeg beach where the specimen was found.
Figure 2.
Major components of a bullet.
Figure 3.
(A) Macrophotograph of the worn machine gun bullet embedded in a conglomeratic Fe/Mn-rich quartz-limestone sandstone bound to a semi-rounded micritic limestone pebble (+HCl). Specimen microphotographs: (B) upper part of the worn bullet encircled by a sintered Fe/Mn-rich halo, (C) a fragment of the bullet-sandstone boundary with a distinct Fe/Mn-rich streak, (D) a ferruginous sandstone (center) in direct contact with a limestone pebble (left) and a bullet fragment (right).
Figure 4.
(A) Macrophotograph of a ferruginous limestone pebble in direct contact with a conglomeratic sandstone. (B) Microphotograph showing a more detailed microtextural relationship between the conglomeratic sandstone and the limestone pebble; note that the yellow ferruginous streak separates these two petrographic components, which may also point to heating.
Table 1.
Concentrations of elements in three different parts of the sample (in mg/kg, otherwise indicated as %).
| Part | Ba | Ca | Cu | Fe | K | Mn | S | Si | Ti | Zn |
|---|---|---|---|---|---|---|---|---|---|---|
| L | 320 ± 60 | 36.3 ± 0.2% | 68 ± 14 | 1.24 ± 0.02% | 3642 ± 177 | 338 ± 56 | 1217 ± 89 | 2.41 ± 0.09% | 413 ± 81 | 104 ± 10 |
| S | 315 ± 63 | 14.6 ± 0.1% | 90 ± 17 | 8.37 ± 0.07% | 4203 ± 230 | 1959 ± 112 | 8041 ± 136 | 14.5 ± 0.19% | 2228 ± 106 | 112 ± 12 |
| B | 380 ± 199 | 6284 ± 519 | 67.0 ± 1.6% | 2.56 ± 0.03% | 405 ± 195 | 314 ± 97 | 9970 ± 418 | 1.70 ± 0.06% | 279 ± 65 | 7.78 ± 02% |
| CRM NIST 27280 hard rock mine waste | ||||||||||
| Certified | 993 | 1950 | 215.5 | 2.78% | 3.38% | 462 | 1.26% | 31% | 6990 | 2570 |
| Determined | 973 ± 38 | 1950 ± 99 | 177 ± 16 | 2.22 ± 0.2% | 3.31 ± 0.1% | 434 ± 58 | 1.10 ± 0.1% | 27 ± 0.1% | 6710 ± 102 | 2082 ± 37 |
| Recovery | 98% | 100% | 82% | 80% | 98% | 94% | 85% | 86% | 96% | 81% |