Julia Semprich<p>What happens if you add heat to sedimentary rocks? You get fun minerals such as andalusite seen here as the white prismatic, nearly square and diamond crystals in metamorphosed slate. The source of the high temperatures was a granite intrusion that created a contact aureole. <br><a href="https://mastodon.online/tags/Geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Geology</span></a> <a href="https://mastodon.online/tags/LakeDistrict" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>LakeDistrict</span></a> <a href="https://mastodon.online/tags/Andalusite" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Andalusite</span></a></p>