Or M. Bialik<p>On average, there is less than a kilometer of sedimentary material between the <a href="https://mastodon.world/tags/seafloor" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>seafloor</span></a> and the magmatic <a href="https://mastodon.world/tags/substrate" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>substrate</span></a>. Unless you're on a continental margin, then it's several kilometers.</p><p><a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GC008115" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">agupubs.onlinelibrary.wiley.co</span><span class="invisible">m/doi/full/10.1029/2018GC008115</span></a></p><p>The maps of related to this study are on the NOAA servers, but for some reason, they are going to be removed soon. If this is relevant for you, back it up now.</p>