Chris White<p>Interbedded argillaceous &amp; tuffaceous <a href="https://sciencemastodon.com/tags/sediments" class="mention hashtag" rel="tag">#<span>sediments</span></a> </p><p>These photos are of <a href="https://sciencemastodon.com/tags/Cambridge" class="mention hashtag" rel="tag">#<span>Cambridge</span></a> <a href="https://sciencemastodon.com/tags/Argillite" class="mention hashtag" rel="tag">#<span>Argillite</span></a>, exposed above the <a href="https://sciencemastodon.com/tags/Squantum" class="mention hashtag" rel="tag">#<span>Squantum</span></a> Member of the <a href="https://sciencemastodon.com/tags/Roxbury" class="mention hashtag" rel="tag">#<span>Roxbury</span></a> Conglomerate (<a href="https://sciencemastodon.com/tags/Neoproterozoic" class="mention hashtag" rel="tag">#<span>Neoproterozoic</span></a>). Prior to the 1970s or so, the Squantum Member was interpreted as <a href="https://sciencemastodon.com/tags/glacial" class="mention hashtag" rel="tag">#<span>glacial</span></a> sediments; it&#39;s now broadly interpreted as debris flows, with the Cambridge being distal turbidites overlying it. I lead a field trip here for <a href="https://sciencemastodon.com/tags/UMassBoston" class="mention hashtag" rel="tag">#<span>UMassBoston</span></a>. See captions.</p><p><a href="https://sciencemastodon.com/tags/outcrop" class="mention hashtag" rel="tag">#<span>outcrop</span></a> <a href="https://sciencemastodon.com/tags/fieldTrip" class="mention hashtag" rel="tag">#<span>fieldTrip</span></a> <a href="https://sciencemastodon.com/tags/photo" class="mention hashtag" rel="tag">#<span>photo</span></a> <a href="https://sciencemastodon.com/tags/rocks" class="mention hashtag" rel="tag">#<span>rocks</span></a> <a href="https://sciencemastodon.com/tags/tuff" class="mention hashtag" rel="tag">#<span>tuff</span></a> <a href="https://sciencemastodon.com/tags/Fufjilm" class="mention hashtag" rel="tag">#<span>Fufjilm</span></a> <a href="https://sciencemastodon.com/tags/Venus" class="mention hashtag" rel="tag">#<span>Venus</span></a> 65mm <a href="https://sciencemastodon.com/tags/macro" class="mention hashtag" rel="tag">#<span>macro</span></a> <a href="https://sciencemastodon.com/tags/Quincy" class="mention hashtag" rel="tag">#<span>Quincy</span></a></p>