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Doehne", "links": { "alternate": { "href": "https://www.zotero.org/edoehne", "type": "text/html" } } } }, "data": { "key": "BTNPJ4IG", "version": 1, "parentItem": "8NVFK2NV", "itemType": "attachment", "linkMode": "linked_url", "title": "577.pdf", "accessDate": "2012-02-15T05:43:23Z", "url": "http://ppg.sagepub.com/cgi/reprint/26/4/577.pdf", "note": "", "contentType": "application/pdf", "charset": "", "tags": [], "relations": { "owl:sameAs": "http://zotero.org/groups/68779/items/TTEQXF48" }, "dateAdded": "2012-02-15T05:43:40Z", "dateModified": "2012-02-15T05:43:40Z" } }, { "key": "86D9NWQV", "version": 1, "library": { "type": "group", "id": 68782, "name": "Stone Weathering-Differential Stress", "links": { "alternate": { "href": "https://www.zotero.org/groups/stone_weathering-differential_stress", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/68782/items/86D9NWQV", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/stone_weathering-differential_stress/items/86D9NWQV", "type": "text/html" } }, "meta": { "createdByUser": { "id": 847428, "username": "edoehne", "name": "Eric Doehne", "links": { "alternate": { "href": "https://www.zotero.org/edoehne", "type": "text/html" } } }, "creatorSummary": "Wright", "parsedDate": "2007", "numChildren": 1 }, "data": { "key": "86D9NWQV", "version": 1, "itemType": "journalArticle", "title": "An overview of the role of weathering in the production of quartz silt", "creators": [ { "creatorType": "author", "firstName": "J. S.", "lastName": "Wright" } ], "abstractNote": "Quartz silt is a widespread detrital sediment with large aeolian (loess) and alluvial silt deposits forming important components of many contemporary landscapes. Despite research findings which indicate that a range of opportunities exist for the comminution of quartz into silt particles within a wide variety of geomorphic environments (e.g. glacial grinding, fluvial comminution, aeolian abrasion, frost weathering, salt weathering, insolation weathering and deep weathering), the 'glacial-aeolian' hypothesis has traditionally been favoured as the most likely explanation for loess formation and loess is seen as primarily a Quaternary phenomenon. As a consequence there has been a tendency to underestimate sediment inputs into loess systems by geomorphological processes operating within pre-Quaternary environments. In particular, earth scientists may have considerably underestimated the role of weathering in global silt generation, as there are now many references to the existence of a patchy but widespread distribution of pre-Quaternary weathering profiles across the glacial and periglacial landscapes of the Northern Hemisphere (e.g. North America, British Isles, north and central Europe), landscapes within which many of the classical loess deposits are located. These observations suggest that weathering profiles may have covered large tracts of the Northern Hemisphere land surface prior to the Quaternary glaciations. This, in turn, may have important implications for quartz silt generation as: (1) experimental studies indicate that many weathering processes are capable of generating significant quantities of silt-sized debris, and (2) particle characteristics displayed by saprolitic material that has developed on quartz rich crystalline source rocks often include significant quantities of either silt-sized material, or quartz grains that are weakened by weathering derived microfractures. Thus, weathering profiles may represent 'mines' of actual and potential quartz silt, available for release into sedimentary systems when these profiles are subsequently reworked by geomorphological processes such as glacial, fluvial and aeolian erosion. © 2007 Elsevier B.V. All rights reserved.", "publicationTitle": "Sedimentary Geology", "publisher": "", "place": "", "date": "12 2007", "volume": "202", "issue": "3", "section": "", "partNumber": "", "partTitle": "", "pages": "337-351", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1016/j.sedgeo.2007.03.024", "citationKey": "", "url": "http://linkinghub.elsevier.com/retrieve/pii/S0037073807001340", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0037-0738", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Microfracture" }, { "tag": "initiation;Granitoid" }, { "tag": "weathering" }, { "tag": "weathering;Salt" }, { "tag": "weathering;Silt;Frost" } ], "collections": [], "relations": { "owl:sameAs": "http://zotero.org/groups/68779/items/AQCXPW87" }, "dateAdded": "2012-02-15T05:43:40Z", "dateModified": "2012-02-15T05:43:40Z" } }, { "key": "R2QGRIDP", "version": 1, "library": { "type": "group", "id": 68782, "name": "Stone Weathering-Differential Stress", "links": { "alternate": { "href": "https://www.zotero.org/groups/stone_weathering-differential_stress", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/68782/items/R2QGRIDP", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/stone_weathering-differential_stress/items/R2QGRIDP", "type": "text/html" } }, "meta": { "createdByUser": { "id": 847428, "username": "edoehne", "name": "Eric Doehne", "links": { "alternate": { "href": "https://www.zotero.org/edoehne", "type": "text/html" } } }, "creatorSummary": "Doehne et al.", "parsedDate": "2005", "numChildren": 0 }, "data": { "key": "R2QGRIDP", "version": 1, "itemType": "journalArticle", "title": "Characterization of carved rhyolite tuff: the Hieroglyphic Stairway of Copan, Honduras", "creators": [ { "creatorType": "author", "firstName": "Eric", "lastName": "Doehne" }, { "creatorType": "author", "firstName": "Stefan", "lastName": "Simon" }, { "creatorType": "author", "firstName": "Urs", "lastName": "Mueller" }, { "creatorType": "author", "firstName": "David", "lastName": "Carson" }, { "creatorType": "author", "firstName": "Alice", "lastName": "Ormsbee" } ], "abstractNote": "The Hieroglyphic Stairway at Cop·n in northwest Honduras is the longest inscription known from the ancient Maya. As part of a larger conservation project of the Instituto HondureÒo de AntropologÌa e Historia (IHAH) and the Getty Conservation Institute (GCI), blocks of uncarved green and buff volcanic tuff as well as samples of flaking tuff from the Hieroglyphic Stairway were characterized for their material properties and state of decay. Flaking appears to be connected to selective dissolution, hygric cycling, lichen hyphae, and calcite precipitation in stone fractures. These results represent the first comprehensive characterization of these materials and aid the understanding of material durability, behavior, and conservation for this important site.", "publicationTitle": "Restoration of buildings and monuments: an international journal = Bauinstandsetzen und Baudenkmalpflege: eine internationale Zeitschrift", "publisher": "", "place": "", "date": "2005", "volume": "11", "issue": "4", "section": "", "partNumber": "", "partTitle": "", "pages": "247-254", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0947-4498", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "(Cop·n);biodeterioration;weathering;rhyolite;building" }, { "tag": "durability;Honduras" }, { "tag": "sites;flaking" }, { "tag": "stone;tuff;archaeological" } ], "collections": [], "relations": { "owl:sameAs": "http://zotero.org/groups/68779/items/ZRIAE7IQ" }, "dateAdded": "2012-02-15T05:43:40Z", "dateModified": "2012-02-15T05:43:40Z" } }, { "key": "XMNVMD5D", "version": 1, "library": { "type": "group", "id": 68782, "name": "Stone Weathering-Differential Stress", "links": { "alternate": { "href": "https://www.zotero.org/groups/stone_weathering-differential_stress", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/68782/items/XMNVMD5D", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/stone_weathering-differential_stress/items/XMNVMD5D", "type": "text/html" } }, "meta": { "createdByUser": { "id": 847428, "username": "edoehne", "name": "Eric Doehne", "links": { "alternate": { "href": "https://www.zotero.org/edoehne", "type": "text/html" } } }, "creatorSummary": "Kaczmarek and Hueckel", "parsedDate": "1998", "numChildren": 0 }, "data": { "key": "XMNVMD5D", "version": 1, "itemType": "journalArticle", "title": "Chemo-Mechanical Consolidation of Clays: Analytical Solutions for a Linearized One-Dimensional Problem", "creators": [ { "creatorType": "author", "firstName": "M.", "lastName": "Kaczmarek" }, { "creatorType": "author", "firstName": "T.", "lastName": "Hueckel" } ], "abstractNote": "", "publicationTitle": "Transport in Porous Media", "publisher": "", "place": "", "date": "1998", "volume": "32", "issue": "1", "section": "", "partNumber": "", "partTitle": "", "pages": "49-74", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": { "owl:sameAs": "http://zotero.org/groups/68779/items/7DBDZTVA" }, "dateAdded": "2012-02-15T05:43:40Z", "dateModified": "2012-02-15T05:43:40Z" } }, { "key": "MHHM37D6", "version": 1, "library": { "type": "group", "id": 68782, "name": "Stone Weathering-Differential Stress", "links": { "alternate": { "href": "https://www.zotero.org/groups/stone_weathering-differential_stress", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/68782/items/MHHM37D6", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/stone_weathering-differential_stress/items/MHHM37D6", "type": "text/html" } }, "meta": { "createdByUser": { "id": 847428, "username": "edoehne", "name": "Eric Doehne", "links": { "alternate": { "href": "https://www.zotero.org/edoehne", "type": "text/html" } } }, "creatorSummary": "Wangler and Scherer", "parsedDate": "2008", "numChildren": 1 }, "data": { "key": "MHHM37D6", "version": 1, "itemType": "journalArticle", "title": "Clay swelling mechanism in clay-bearing sandstones", "creators": [ { "creatorType": "author", "firstName": "Timothy", "lastName": "Wangler" }, { "creatorType": "author", "firstName": "George", "lastName": "Scherer" } ], "abstractNote": "Abstract Swelling clays in stone can generate damaging stresses during a wetting or a drying cycle, which lead to deterioration of building stones such as Portland Brownstone. There are two primary types of swelling identified for clays: short-range, ordered intracrystalline swelling, and long-range, continuous osmotic swelling. Identification of the swelling mode is important for understanding and ultimately preventing swelling damage. Through comparison of XRD and swelling experiments with cationic pretreatments and organic solvents, we demonstrate that intracrystalline swelling is the primary mode of swelling present in three different stones, including Portland Brownstone. The results highlight the importance of the counterbalancing cation to the swelling process, and a method for characterizing the intracrystalline swelling in sandstones is developed. Finally, the implications of long-term swelling behavior for stones are discussed.", "publicationTitle": "Environmental Geology", "publisher": "", "place": "", "date": "12 2008", "volume": "56", "issue": "3", "section": "", "partNumber": "", "partTitle": "", "pages": "529-534", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1007/s00254-008-1380-3", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0943-0105", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": { "owl:sameAs": "http://zotero.org/groups/68779/items/HZGN5XTJ" }, "dateAdded": "2012-02-15T05:43:40Z", "dateModified": "2012-02-15T05:43:40Z" } }, { "key": "4D7GHMT6", "version": 1, "library": { "type": "group", "id": 68782, "name": "Stone Weathering-Differential Stress", "links": { "alternate": { "href": "https://www.zotero.org/groups/stone_weathering-differential_stress", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/68782/items/4D7GHMT6", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/stone_weathering-differential_stress/items/4D7GHMT6", "type": "text/html" } }, "meta": { "createdByUser": { "id": 847428, "username": "edoehne", "name": "Eric Doehne", "links": { "alternate": { "href": "https://www.zotero.org/edoehne", "type": "text/html" } } }, "creatorSummary": "Jenkins and Smith", "parsedDate": "1990", "numChildren": 0 }, "data": { "key": "4D7GHMT6", "version": 1, "itemType": "journalArticle", "title": "Daytime rock surface temperature variability and its implications for mechanical rock weathering; Tenerife, Canary Islands", "creators": [ { "creatorType": "author", "firstName": "K. A.", "lastName": "Jenkins" }, { "creatorType": "author", "firstName": "B. J.", "lastName": "Smith" } ], "abstractNote": "Summer and winter rock surface temperature measurements are presented from three sites along an altitudinal gradient. Significant between- and within-site variability is recognised related to insolation, cloud cover and air temperature differences, maritime influences and time of year. The variability argues against the use of a single rock temperature regime to characterise hot desertic environments in, for example, weathering simulation studies. Superimposed upon diurnal patterns of heating and cooling are numerous short- (3-15 minutes) and medium-term (1-2 hours) fluctuations related to wind-speed and cloud cover variations. Rates of surface temperature change are very high during these fluctuations (>3˚C/minute) and it is proposed that they may enhance the operation of a number of mechanical rock weathering mechanisms.", "publicationTitle": "Catena", "publisher": "", "place": "", "date": "1990", "volume": "17", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "4-5", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Atlantic Ocean Islands" }, { "tag": "Canary Islands" }, { "tag": "Climate" }, { "tag": "Pico del Teide" }, { "tag": "Surface Properties" }, { "tag": "Temperature" }, { "tag": "Tenerife" }, { "tag": "altitude" }, { "tag": "diurnal variations" }, { "tag": "geomorphology" }, { "tag": "igneous rocks" }, { "tag": "physical weathering" }, { "tag": "seasonal variations" }, { "tag": "volcanic rocks" }, { "tag": "volcanoes" }, { "tag": "volcanology" }, { "tag": "wea" } ], "collections": [], "relations": { "owl:sameAs": "http://zotero.org/groups/68779/items/REPFJCA3" }, "dateAdded": "2012-02-15T05:43:40Z", "dateModified": "2012-02-15T05:43:40Z" } }, { "key": "QJEUEZ3T", "version": 1, "library": { "type": "group", "id": 68782, "name": "Stone Weathering-Differential Stress", "links": { "alternate": { "href": "https://www.zotero.org/groups/stone_weathering-differential_stress", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/68782/items/QJEUEZ3T", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/stone_weathering-differential_stress/items/QJEUEZ3T", "type": "text/html" } }, "meta": { "createdByUser": { "id": 847428, "username": "edoehne", "name": "Eric Doehne", "links": { "alternate": { "href": "https://www.zotero.org/edoehne", "type": "text/html" } } }, "creatorSummary": "Warke and Smith", "parsedDate": "1998", "numChildren": 1 }, "data": { "key": "QJEUEZ3T", "version": 1, "itemType": "journalArticle", "title": "Effects of direct and indirect heating on the validity of rock weathering simulation studies and durability tests", "creators": [ { "creatorType": "author", "firstName": "P. A.", "lastName": "Warke" }, { "creatorType": "author", "firstName": "B. J.", "lastName": "Smith" } ], "abstractNote": "Rock surface and subsurface temperature responses in samples exposed to direct heating (insolation) under natural hot desert conditions reveal considerable variability between lithologies related to differences in thermal properties, especially albedo and thermal conductivity. However, when the same samples are heated indirectly by air in an oven-based environmental cabinet, lithological differences in temperature response disappear and all samples attain temperatures similar to the air temperature within the cabinet. Rates and patterns of rock decay produced in such environmental cabinets may not, therefore, reflect those encountered under natural conditions, where breakdown is related to micro-environmental conditions at the rock/air interface and where rock temperature is one of the most important controlling factors. In addition to implications for assessment of weathering effectiveness, use of only indirect forms of heating affects the determination of comparative rock durability because all rock types are cycled through the same temperature regimes. Because temperature exerts such a major control on rock breakdown through its control on physical and chemical weathering processes, all significant factors influencing it must be included in the design of weathering simulations and durability tests.", "publicationTitle": "Geomorphology", "publisher": "", "place": "", "date": "1998", "volume": "22", "issue": "3-4", "section": "", "partNumber": "", "partTitle": "", "pages": "347-357", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0169-555X", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "71.2.1;temperature" }, { "tag": "72.13.2" }, { "tag": "and" }, { "tag": "durability;weathering;Weathering" }, { "tag": "effect;Rock" }, { "tag": "landforms" }, { "tag": "mechanics" }, { "tag": "related" }, { "tag": "–" } ], "collections": [], "relations": { "owl:sameAs": "http://zotero.org/groups/68779/items/GNBWG8ZR" }, "dateAdded": "2012-02-15T05:43:40Z", "dateModified": "2012-02-15T05:43:40Z" } } ]