Deseado Massif

<p>The Deseado Massif  is a <a href="/facts/Massif/0tR9poFq">massif</a> in southern <a href="/facts/Patagonia/HmNlUCh5">Patagonia</a> located in the Argentine province of <a href="/facts/Santa_Cruz_Province_(Argentina)/cFT6bGK7">Santa Cruz</a>. On surface the massif is made up of Middle to Late <a href="/facts/Jurassic/o5Cy4KzX">Jurassic</a>-aged <a href="/facts/Felsic/0jpm1eSA">felsic</a> <a href="/facts/Volcanic_rock/ID3oPwtM">volcanic rocks</a>. Analysis of <a href="/facts/Mantle_(geology)/RpDdtjCr">mantle</a> <a href="/facts/Xenolith/nP1MlHvG">xenoliths</a> reveals that the <a href="/facts/Subcontinental_lithospheric_mantle/aPSqARQI">lithospheric mantle</a> of the Deseado Massif is about 2100 to 1000 million years old. As such the Deseado Massif is one of the oldest regions of Patagonia as it existed in some form during the <a href="/facts/Paleoproterozoic/gMS69p5r">Paleo</a> and <a href="/facts/Mesoproterozoic/bJ8uWQUH">Mesoproterozoic</a>. In the <a href="/facts/Neoproterozoic/89NsnsM1">Neoproterozoic</a> the Deseado Massif together with the <a href="/facts/Geology_of_the_Falkland_Islands/D3xVDgKY">Falkland Islands</a> formed part of the supercontinent <a href="/facts/Rodinia/oBjuSeet">Rodinia</a>. Since then Deseado Massif has been next to the Falkland Islands.
</p><p>The eastern sector of the Deseado Massif contains a Jurassic <a href="/facts/Caldera/eWvTK8Es">caldera</a> with a <a href="/facts/Zircon/84APfbLt">zircon</a> <a href="/facts/Uranium%25E2%2580%2593lead_dating/LMCJBhrQ">U–Pb</a> eruption age of 178.7 ± 1.9 million years.
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Deseado Massif open-in-new

Deseado Massif