# Alec Brenner on When Tectonic Plates First Moved

Page: https://stenobird.com/podcast/geology-bites-159592/alec-brenner-on-when-tectonic-plates-first-moved
Text version: https://stenobird.com/podcast/geology-bites-159592/alec-brenner-on-when-tectonic-plates-first-moved.md
Podcast: [Geology Bites](https://stenobird.com/podcast/geology-bites-159592)
Published: 2026-04-30T14:06:42+00:00
Episode link: https://podcasters.spotify.com/pod/show/geologybites/episodes/Alec-Brenner-on-When-Tectonic-Plates-First-Moved-e3imrl6
Audio file: https://anchor.fm/s/80e7bb4/podcast/play/119286886/https%3A%2F%2Fd3ctxlq1ktw2nl.cloudfront.net%2Fstaging%2F2026-3-30%2F82cf6431-604c-c91d-a423-6a50491aab5d.mp3
Processing state: not_requested
JSON: https://stenobird.com/v1/public/podcasts/geology-bites-159592/episodes/alec-brenner-on-when-tectonic-plates-first-moved
Duration seconds: 1735

## Resource

A key development in the history of the early Earth is the formation of lithospheric plates that move independently of one another. In this episode, Brenner describes how he used paleomagnetic methods to detect relative motion between two ancient cratons, the East Pilbara and the Kaapvaal, 3.5 billion years ago. This is a full billion years earlier than any previous such detection, and it enables us to narrow down the kind of tectonics operating in the Paleoarchean. Of the candidate regimes, episodic subduction models fit his data best. Brenner is a Postdoctoral Associate in the Department of Earth & Planetary Science at Yale University.

## Actions

- request_transcript: `POST https://stenobird.com/v1/public/podcasts/geology-bites-159592/episodes/alec-brenner-on-when-tectonic-plates-first-moved/transcription-requests` — Idempotently request low-priority transcript generation for this episode.
- read_markdown: `GET https://stenobird.com/podcast/geology-bites-159592/alec-brenner-on-when-tectonic-plates-first-moved.md` — Read the agent-friendly Markdown representation of this episode resource.

A page view does not enqueue transcription. Agents should invoke `request_transcript` explicitly when they need this episode processed.

## Transcript

Full transcripts are not published on public pages unless there is a clear rights basis.