{"title":"所有的冰川二晶岩都是冰川吗?对古气候学的影响","authors":"Mats O. Molén","doi":"10.1111/gto.12500","DOIUrl":null,"url":null,"abstract":"<p>Interpretations of the origins of pre-Pleistocene diamictites are in a state of flux, changing from glacial processes to sediment gravity flows (SGFs). Working methods for the study of such deposits need to be multi-proxy and process-sedimentological and not start with presumptions based on former models or interpretations. For instance, the detailed documentation of pavements, dropstones and erratics indicate that a shift from glaciogenic interpretations to SGFs for many pre-Pleistocene diamictites is needed. In another example, surface microtextures (SM) formed by glaciers display a combination of large-scale fractures and (irregular) abrasion, in contrast to non-glacial environments, and may therefore be used as a quick diagnostic working tool.</p>","PeriodicalId":100581,"journal":{"name":"Geology Today","volume":"41 1","pages":"10-18"},"PeriodicalIF":0.0000,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Are all glacial diamictites glacial? Implications for palaeoclimatology\",\"authors\":\"Mats O. Molén\",\"doi\":\"10.1111/gto.12500\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Interpretations of the origins of pre-Pleistocene diamictites are in a state of flux, changing from glacial processes to sediment gravity flows (SGFs). Working methods for the study of such deposits need to be multi-proxy and process-sedimentological and not start with presumptions based on former models or interpretations. For instance, the detailed documentation of pavements, dropstones and erratics indicate that a shift from glaciogenic interpretations to SGFs for many pre-Pleistocene diamictites is needed. In another example, surface microtextures (SM) formed by glaciers display a combination of large-scale fractures and (irregular) abrasion, in contrast to non-glacial environments, and may therefore be used as a quick diagnostic working tool.</p>\",\"PeriodicalId\":100581,\"journal\":{\"name\":\"Geology Today\",\"volume\":\"41 1\",\"pages\":\"10-18\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2025-01-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Geology Today\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1111/gto.12500\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geology Today","FirstCategoryId":"1085","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/gto.12500","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Are all glacial diamictites glacial? Implications for palaeoclimatology
Interpretations of the origins of pre-Pleistocene diamictites are in a state of flux, changing from glacial processes to sediment gravity flows (SGFs). Working methods for the study of such deposits need to be multi-proxy and process-sedimentological and not start with presumptions based on former models or interpretations. For instance, the detailed documentation of pavements, dropstones and erratics indicate that a shift from glaciogenic interpretations to SGFs for many pre-Pleistocene diamictites is needed. In another example, surface microtextures (SM) formed by glaciers display a combination of large-scale fractures and (irregular) abrasion, in contrast to non-glacial environments, and may therefore be used as a quick diagnostic working tool.