Exhuming my thesis ... an update

Update: this is my last post as I move on. Didn't plan it that way, but ending where I began  _is_ satisfying.

By the way, "exhuming my thesis" was an inside joke: the geology and tectonics both in my area in N Ontario and the inspiration paper in Alaska talked about "exhumed terranes"; continental blocks that were buried and metamorphosed, displaced and then exhumed back to the surface to their current location.

In my exploration of climate change and precursors in the Proterozoic - see classnotes here - I ran across this other paper here: it linked in addition to a cracking map on another platform, QGIS (here) I also used in the past. It included the latest in terrane interpretation, and it also posted magnetic data (source). It's a lot less distinct but the main features are discernible:

interpretation (click to enlarge)

raw data (click to enlarge)

I brought this up however not for the poorer data, but for the terranes identified by those authors in this 2022 work, twenty years after the Alaska paper and thirty after mine:

source at bottom (click to enlarge)

Their Mazatsal and Yavapai Terranes correspond to mine purported to be south of the Manitoulin Island Discontinuity bisecting the middle of the diagram. Again it's a sketch diagram that points to a collection of terranes, two decades after the USGS's and three after mine in my previous post. 

New Years Eve 2000 racing by Greenwich Meridian

Update: note a dash of AI mixed in at the bottom for fun

Our TV rung in 2025 live in Paris in my time zone, and six hours later in NYC dropping its ball in Times Square; nothing matches however this cracking event in London to usher in the New Millennium: barges were aligned in the middle of the River Thames, spaced exactly 1 s. apart as the earth rotated past midnight GMT in London, from the Meridian at the Millennium Dome to the east, to Vauxhall Bridge to the west.