| 觀看：47 次｜回覆：0 則 |
 |
||
| Name：DavidBor | 01, Apr, 2024 15:04:55 | |
 |
orthoclase and quartz percentages in the feldspar plus quartz fraction by the use of x ray diffraction is given. The pollen diagrams from the 'regional' sites show a remarkable degree of similarity. In each there are three more or less contemporaneous periods of extensive forest clearance separated | |
 |
||
回覆留言