https://earthnotes.blog/earthnotes-team/2026-03-07T23:46:37+00:00weekly0.6https://earthnotes.blog/2026/03/07/so-just-when-did-animals-first-evolve/https://earthnotes.blog/wp-content/uploads/2026/03/image-3.pngimagehttps://earthnotes.blog/wp-content/uploads/2026/03/image-2.pngimagehttps://earthnotes.blog/wp-content/uploads/2026/03/image-1.pngimagehttps://earthnotes.blog/wp-content/uploads/2026/03/image.pngimage2026-03-07T04:44:37+00:00monthlyhttps://earthnotes.blog/2025/11/02/archived-correspondence-about-a-pegmatite-and-a-sinister-association/https://earthnotes.blog/wp-content/uploads/2025/10/image-3.pngimagehttps://earthnotes.blog/wp-content/uploads/2025/10/image-2.pngimagehttps://earthnotes.blog/wp-content/uploads/2025/10/image-1.pngimagehttps://earthnotes.blog/wp-content/uploads/2025/10/image.pngimageThe pegmatite specimen accompanying the correspondence.2025-11-03T06:46:12+00:00monthlyhttps://earthnotes.blog/2019/02/15/the-beach-cliffs-north-of-stansbury/https://earthnotes.blog/wp-content/uploads/2019/02/dscn1228-1.jpgVersion 2https://earthnotes.blog/wp-content/uploads/2019/02/dscn1277-1.jpgVersion 2https://earthnotes.blog/wp-content/uploads/2019/02/dscn1266-2.jpgVersion 2https://earthnotes.blog/wp-content/uploads/2019/02/dscn1207-1.jpgVersion 2https://earthnotes.blog/wp-content/uploads/2019/02/dscn1223-2.jpgVersion 22025-06-20T12:48:13+00:00monthlyhttps://earthnotes.blog/2025/06/19/a-heritage-gem-in-adelaide-universitys-tate-museum/2025-06-19T07:56:17+00:00monthlyhttps://earthnotes.blog/2025/01/04/engraved-landscape-model-in-palaeolithic-shelter/https://earthnotes.blog/wp-content/uploads/2025/01/image-2.pngimagehttps://earthnotes.blog/wp-content/uploads/2025/01/image-1.pngimagehttps://earthnotes.blog/wp-content/uploads/2025/01/image.pngimage2025-01-04T04:05:50+00:00monthlyhttps://earthnotes.blog/2021/08/26/some-of-our-alumni-have-made-history/https://earthnotes.blog/wp-content/uploads/2021/08/bear-thomas-815x1024-1.jpegbear-thomas-815x10242021-08-26T05:09:38+00:00monthlyhttps://earthnotes.blog/2021/01/25/surficial-albitization-palaeoweathering-preserved-beneath-the-extensive-triassic-unconformity-in-western-europe/2021-01-28T06:17:09+00:00monthlyhttps://earthnotes.blog/2021/01/28/new-ideas-in-science-can-take-ages-to-be-understood-and-accepted/2021-01-28T06:09:50+00:00monthlyhttps://earthnotes.blog/2013/11/13/rex-minerals-hillside-mine-a-critique-of-the-proposal/https://earthnotes.blog/wp-content/uploads/2013/11/image001.jpgMap showing location of proposed Hillside Project in relation to Ardrossan and Pine Point on Yorke Peninsula, South AustraliaMap showing location of proposed Hillside Project in relation to Ardrossan and Pine Point on Yorke Peninsula, South Australia2021-01-25T03:27:13+00:00monthlyhttps://earthnotes.blog/2013/11/28/where-do-these-rocks-come-from/https://earthnotes.blog/wp-content/uploads/2013/11/medard-map.jpgIce flow from NorwayIce flow from Norwayhttps://earthnotes.blog/wp-content/uploads/2013/11/stone-wall-medard.jpgStone wall with pink & red coloured rocksStone wall with pink & red coloured rocks2021-01-25T03:26:36+00:00monthlyhttps://earthnotes.blog/about/2021-01-25T03:23:11+00:00weekly0.6https://earthnotes.blog/2020/08/08/boulder-lags-in-rosetta-bay-at-victor-harbor-south-australia/https://earthnotes.blog/wp-content/uploads/2020/08/howchin-1910a_plates_page_08.jpgHowchin (1910a)_plates_Page_08https://earthnotes.blog/wp-content/uploads/2020/08/dscn0045.jpegPetrel CoveDetail of granite and other boulders (probable erratics forming a lag weathered out of Permian glacigenes).https://earthnotes.blog/wp-content/uploads/2020/08/dscn1951.jpegRosetta BayLag of erratics overlying and being exhumed from diamictite adjacent to boat ramp.https://earthnotes.blog/wp-content/uploads/2020/08/serio-0796-wright-island.jpegSERIO-0796-Wright-Island2020-08-11T03:45:46+00:00monthlyhttps://earthnotes.blog/2020/07/27/studies-of-floral-ecology-minesite-rehabilitation-on-christmas-island-indian-ocean/https://earthnotes.blog/wp-content/uploads/2020/07/fig-2_paper-1-1.jpgFig 2_Paper 1https://earthnotes.blog/wp-content/uploads/2020/07/fig-3_paper-1-1.jpgFig 3_Paper 12020-07-27T04:09:42+00:00monthlyhttps://earthnotes.blog/2019/07/25/whats-the-significance-of-the-large-granite-erratics-scattered-through-the-inman-valley-in-south-australia/https://earthnotes.blog/wp-content/uploads/2019/07/dscn1960.jpgRosetta HeadDiamictite as in previous photoshttps://earthnotes.blog/wp-content/uploads/2019/07/dscn1958.jpgRosetta BayDiamictite beneath erritic lag adjacent to boat ramp. Note blue-grey colour of clayey grit matrix, mabundant small granite and other clasts, goethite staining and carbonate-filled fractures. 50c coin for scale.https://earthnotes.blog/wp-content/uploads/2019/07/dscn0027.jpg– Version 2https://earthnotes.blog/wp-content/uploads/2019/07/dscn1044.jpgGlacier Rock – Version 3Smoothed & striated bedrock pavement overlain by diamictite containing large granite erratics (dropstones) in valley wall.https://earthnotes.blog/wp-content/uploads/2019/07/img_0367.jpgNear Sawpit Rd-Thompson Rd intersection – Version 3'Isolated' granite and other erratics.https://earthnotes.blog/wp-content/uploads/2019/07/dscn0019.jpg– Version 2https://earthnotes.blog/wp-content/uploads/2019/07/dscn1951.jpgRosetta BayLag of erratics overlying and being exhumed from diamictite adjacent to boat ramp.https://earthnotes.blog/wp-content/uploads/2019/07/dscn1922.jpgMt Alma strewnfieldCollection of granite erratics in large strewnfield west of Mt Alma roadhttps://earthnotes.blog/wp-content/uploads/2019/07/171005_erratics-vs-soils_cropped.jpg171005_erratics vs soils_croppedMap of soils in the Inman Valley & surrounds showing locations of erratics (red dots - Howchin 1926; purple dots - recent field observations). Yellow indicates the dominant soil type - ‘G3: Thick sand over clay’ which corresponds closely to Howchin’s ‘Permo-Carboniferous glacial’ deposits and is promulgated on recent geological maps on which the soil mapping was based. Red = areas of ‘L1: Shallow soil on rock’ where bedrock is exposed or close to the surface on the steep slopes. Green = areas of ‘K: shallow to moderately deep acidic soils on rock’. Brown colours = areas of ‘F2: Sandy loam over poorly structured brown or dark clay’ soils, ‘E3: Brown or grey cracking clay’ soils, and F1: Loam over brown or dark clay in the modern stream valleys.https://earthnotes.blog/wp-content/uploads/2019/07/171009_howchin-erratics-map_enhanced_cropped.jpg171009_Howchin erratics map_enhanced_croppedEnhanced map of ‘greater’ Inman River valley by Howchin (1926) showing his locations of erratics (red dots) and striated pavements (with directions of ice movement – purple arrows). Region coloured in yellow was assigned to ‘Permo-Carboniferous glacial’ deposits; other coloured areas are bedrock of various types and ages.2019-08-07T08:03:11+00:00monthlyhttps://earthnotes.blog/2018/10/08/sir-douglas-mawson-university-of-adelaide/https://earthnotes.blog/wp-content/uploads/2018/10/img_0910.jpgIMG_0910https://earthnotes.blog/wp-content/uploads/2018/10/img_0909.jpgIMG_09092018-10-08T03:38:26+00:00monthlyhttps://earthnotes.blog/2018/09/06/gulf-st-vincent-adelaide-beaches/2018-09-06T07:00:08+00:00monthlyhttps://earthnotes.blog/2015/02/02/peeling-back-the-layers-under-adelaide/https://earthnotes.blog/wp-content/uploads/2015/02/geology-of-adelaide-fig4.jpgFig 4Fig 4. N-S cross-section from North Adelaide directly south along King William Street to Greenhill Road showing tilted Tertiary strata (45-10 Ma = million years) under Adelaide, overlain by horizontal calcareous Hallett Cove Sandstone (4-2 Ma) and younger alluvial Hindmarsh Clay deposits. River Torrens has cut a shallow valley into underlying deposits. (Alley & Lindsay, Ch19, in Drexel & Preiss, 1995, Fig 10.14).https://earthnotes.blog/wp-content/uploads/2015/02/fig3-gostin-bibliophile.jpgFig3Fig 3. Simplified cross-section from Grange eastwards to Mt Lofty Ranges showing effects of faulting on topography of Adelaide region. The hardest and oldest rocks forming Mt Lofty Ranges and “basement” to Adelaide city are Precambrian Adelaidean System (after Selby & Lindsay 1982).https://earthnotes.blog/wp-content/uploads/2015/02/fig2.jpgFig2Fig 2. Simplified block diagram of Adelaide region showing general topography formed by tilted downfaulted blocks containing mainly marine Tertiary and younger sediments (45 million years to present) of St Vincent Basin (yellow).https://earthnotes.blog/wp-content/uploads/2015/02/adel-fig-1-alluvial-fans.jpgAdel. Fig.1 alluvial fansFig 1. Adelaide Plains and western slopes of Mount Lofty Ranges, including diagrammatic representation of alluvial fans associated with major streams (after Aitchison et al. 1954; Twidale 1976).2018-05-29T04:53:27+00:00monthlyhttps://earthnotes.blog/2018/05/25/paradigms-in-astronomy-earth-history-are-not-absolute/https://earthnotes.blog/wp-content/uploads/2018/05/ydb-field.jpgYDB fieldhttps://earthnotes.blog/wp-content/uploads/2018/05/colliding-galaxies.jpgColliding-galaxies2018-05-25T03:14:13+00:00monthlyhttps://earthnotes.blog/2018/05/16/tate-museum-attracts-young-scientists/2018-05-16T01:57:22+00:00monthlyhttps://earthnotes.blog/2018/02/14/the-giles-complex-intrusions-central-australia/https://earthnotes.blog/wp-content/uploads/2018/02/image004.pngimage004https://earthnotes.blog/wp-content/uploads/2018/02/image003.pngimage003https://earthnotes.blog/wp-content/uploads/2018/02/image002.pngimage002https://earthnotes.blog/wp-content/uploads/2018/02/image001.pngimage0012018-02-14T05:51:23+00:00monthlyhttps://earthnotes.blog/2015/07/07/a-conversation-with-the-community-about-mining-and-environmental-management/https://earthnotes.blog/wp-content/uploads/2015/07/cratons.jpgCratonshttps://earthnotes.blog/wp-content/uploads/2015/07/radiometric-k.pngRadiometric Khttps://earthnotes.blog/wp-content/uploads/2015/07/aeromag.pngAeromagAirborne magnetics give clear indications of the geological makeup and structure (‘bones’) of the land at various depths beneath the surface (red = most magnetic rock; blue = least magnetic rocks). (Map from SARIG)https://earthnotes.blog/wp-content/uploads/2015/07/stenhouse-bay.pngStenhouse Bayhttps://earthnotes.blog/wp-content/uploads/2015/07/price-saltpans.pngPrice saltpanshttps://earthnotes.blog/wp-content/uploads/2015/07/klein-point.jpgKlein Pointhttps://earthnotes.blog/wp-content/uploads/2015/07/ardrossan.jpgArdrossan2017-10-09T04:49:32+00:00monthlyhttps://earthnotes.blog/2016/05/29/fossil-shells-at-stansbury-south-australia-record-a-higher-sealevel-125000-years-ago/https://earthnotes.blog/wp-content/uploads/2016/05/fig-2.jpgFig 2Fig. 2. Sea level curve for the past 130 000 years. Adapted from Lambeck and Chappell (2001). The thickness of the line of the curve is an expression of the degree of uncertainty of the calculated sea-levels. During the Last Glacial Maximum sea level was about 120 m lower than at present. The Last Interglacial warm period occurred about 130 000 to 120 000 years ago, when sea level was at least 2 m higher than at present. The present interglacial warm period (Stage 1) has existed for little more than the past 10 000 years. Source: Cann, J. (2014). Robe Geological trail. (Geological Society of Australia: South Australian Division).https://earthnotes.blog/wp-content/uploads/2016/05/img_0272_cropped.jpgIMG_0272_croppedFig. 1 Assemblage of fossil shells found in excavation.2017-10-09T04:46:55+00:00monthlyhttps://earthnotes.blog/2016/12/22/new-report/https://earthnotes.blog/wp-content/uploads/2016/12/front-page.jpgfront-page2017-01-10T23:12:28+00:00monthlyhttps://earthnotes.blog/2014/08/24/draft-letter-to-the-editor-yorke-peninsula-country-times-proposed-hillside-mine-near-pine-point-yorke-peninsula-south-australia/2014-08-24T12:07:00+00:00monthlyhttps://earthnotes.blog/2014/06/11/a-lesson-learned/https://earthnotes.blog/wp-content/uploads/2014/06/140611_springmount-locality-map.jpg140611_Springmount locality mapFigure 1: Location map. Site studied marked by red star.https://earthnotes.blog/wp-content/uploads/2014/06/springmount2_cropped.jpgSpringmount2_croppedFigure 2: Pebbles and cobbles eroding from a bleached and weathered sand-silt material exposed at the base of a Xanthorrhea.https://earthnotes.blog/wp-content/uploads/2014/06/springmount6-cropped.jpgSpringmount6-croppedFigure 5: Pebbles and cobbles, now seen as significantly deformed parallel to the cleavage in steeply dipping bedrock which has been strongly altered by weathering. https://earthnotes.blog/wp-content/uploads/2014/06/springmount4_cropped.jpgSpringmount4_croppedFigure 4: Pebbles and cobbles with a clearly defined ‘imbricate’ habit within the bleached, weathered and somewhat ferruginised sand-silt matrix. Again note the oblate character of many of the cobbles.https://earthnotes.blog/wp-content/uploads/2014/06/springmount3_cropped.jpgSpringmount3_croppedFigure 3: Scatter of pebbles and cobbles eroding from a bleached, weathered and somewhat ferruginised sand-silt material. Note the oblate character of many of the cobbles.https://earthnotes.blog/wp-content/uploads/2014/06/140609_sarigmap-3_springmount_site.jpg140609_SarigMap-3_Springmount_siteFigure 6: Geological map showing site location (red star) and distribution of basal Proterozoic conglomerate (Nol Aldgate Sandstone). Geology as follows: Orange-brown (Lb) = basement Barossa Complex; dark brown (NoI, Nds, Nl etc) = Proterozoic; pale brown (Eec, Eeb etc) = Cambrian Kanmantoo Group; blue (CP-j) = Permian glacigene sediments; orange (T) = undifferentiated Tertiary weathered zone materials; yellow (Q) = undifferentiated Quaternary alluvials.2014-06-12T05:52:50+00:00monthlyhttps://earthnotes.blogdaily1.02026-03-07T23:46:37+00:00