1.0Watershed Process and Estuary Sustainability Research Grouphttps://umaine.edu/watershedresearchrich900600<blockquote class="wp-embedded-content" data-secret="CWeKZcRZf7"><a href="https://umaine.edu/watershedresearch/geologic-history/">Penobscot Basin Geologic History</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://umaine.edu/watershedresearch/geologic-history/embed/#?secret=CWeKZcRZf7" width="100%" height="338" title="“Penobscot Basin Geologic History” — Watershed Process and Estuary Sustainability Research Group" data-secret="CWeKZcRZf7" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); /* ]]> */ </script> Landscape Level The bedrock geology and surficial geology of Maine provide the base for the Penobscot River. Rock types and characteristics, their thickness, stratigraphic relationships, and geographic distribution all effect the river’s morphological characteristics. Maine’s geologic history covers more than half a billion years and has been shaped by a variety of processes such as […]https://umaine.edu/watershedresearch/wp-content/uploads/sites/554/2020/09/PenobscotHistory_T1.png1027911