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The Geologic Column

Geology newsletter by Richard I. Gibson. Anything about geology, with a focus on minerals and tectonics.

Newsletter · By Richard I Gibson · English · Official site

Indexed issues, last 90 days
18
Latest publication
Sep 30, 2026
Audience
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Earliest in this view
Aug 21, 2026

Latest issues

  1. Issue · Sep 30, 2026

    Columnar jointing (opens the original)

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    <img alt="" class="sizing-normal" height="576" src="https://substackcdn.com/image/fetch/$s_!RS2h!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fc2e8741c-56ec-43cc-8bfb-881a8d670c6c_1023x576.jpe

  2. Issue · Sep 28, 2026

    Where’s the coesite? (opens the original)

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    <img alt="" class="sizing-normal" height="800" src="https://substackcdn.com/image/fetch/$s_!lp8w!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Ffa9811a1-04f4-40ab-88c6-c5ba3700019b_1167x800.jpe

  3. Issue · Sep 25, 2026

    The Flathead Sandstone 2 (opens the original)

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    <img alt="" class="sizing-normal" height="600" src="https://substackcdn.com/image/fetch/$s_!eYoS!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F8cfa6fb5-8fcd-441e-a927-90f0b26b1a8e_450x600.jpeg"

  4. Issue · Sep 23, 2026

    Salt domes in Iran (opens the original)

    Excerpt · Positive tone

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    <img alt="" class="sizing-normal" height="740" src="https://substackcdn.com/image/fetch/$s_!vbw1!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fe53f7ad3-d26d-45ad-b0d1-799aec7dc3cf_1658x843.jpe

  5. Issue · Sep 21, 2026

    One Butte Specimen (opens the original)

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    <img alt="" class="sizing-normal" height="854" src="https://substackcdn.com/image/fetch/$s_!MpIJ!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F68d74f12-2bbe-44e4-905f-315544b2c526_1000x854.jpe

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