(
www.vermontquarries.com), and a high purity calcium carbonate in the Middlebury open pit quarry of Omya Inc. (
www.omya-na.com). Traveling south down US Rt #7 will provide glimpses of many interesting geological features. The Barber Hill syenite intru- sive on the West, Mt Philo hill and Snake Mt escarpments are remnants of Logan’s Line over thrust and the Adirondacks to the west with the Green Mountains to the east give a sense of the overall geological boundaries to the synclinorium that is the ultimate destina- tions of the field trip. The open pit OMYA quarry in Middlebury and the underground mine/quarry of Vermont Quarries will give ample evidence of the folded structures at both locations. These operations have had to adjust to on-going hydrogeological and environmental issues that will be of interest to many of the attendees.
3
Title: Economic Geology of the Granite Dimension Stone Industry in Vermont
Leaders: Dorothy Richter, CPG, PG & Donald Murray, PE
Date: September 16, 2019, 8:00 am – 4:00 pm Dorothy is currently President of RICHTER GEOLOGY PLLC in Windham, New
Hampshire. She was Chief Geologist at Rock of Ages Corporation in Barre, Vermont from 1976 to 1984. Don is Chief Engineer for Rock of Ages Corporation in Barre, Vermont
Description: Devonian granitic plutons of varying size intruded Silurian-Devonian metasedimentary rocks of the Connecticut Valley Trough in eastern Vermont between the Massachusetts and Quebec borders during the Acadian Orogeny. Several of the smaller plutons have been quarried for dimension stone at one time or other. Most are grey to white, two-feldspar two-mica granitoids. During this field trip, we will examine active granite dimension stone quarry operations in Bethel, Barre, and possibly Woodbury, Vermont. We will also visit an active granite processing facility in Barre. The emphasis will be on the geologic factors that make these granite bodies viable for economic operations today.
4
Title: Landslide Hazards at Jeffersonville and Smugglers’ Notch, Northern Vermont Leaders: George Springston and Leslie Kanat
Date: September 16, 2019; 8:00 am – 4:00 pm Mr. George Springston is a Research Associate at the Department of Earth and
Environmental Sciences at Norwich University in Northfield, Vermont. He specializes in surficial geologic mapping and evaluation of slope stability hazards. Mr. Springston has a Bachelor’s degree in Geology from Clemson University and a Master’s in Geology from the University of Massachusetts at Amherst.
Dr. Leslie Kanat is a Professor of Geology at Northern Vermont University-Johnson.
His earlier research focused on metamorphic petrology and structural geology, yet it has broadened in order to meet the needs of the University. Dr. Kanat has a Bachelor’s and Master’s degree in Geology from Wayne State University, and a Ph.D. in Earth Sciences from the University of Cambridge
Description: At the Village of Jeffersonville we will examine evidence for a series of large landslides in glaciolacustrine sediments on the east side of the Brewster River. We will discuss the stratigraphy of the sediments, the history and mechanisms of slope failures, and the risks posed to the village below (Figure 1 [upper left] - The Jeffersonville landslide after event on April 18, 1999. Photo by Jon Kim, Vermont Geological Survey.). At Smugglers’ Notch we will examine rock fall and debris flow hazards in a glacially-scoured notch on the flank of Mount Mansfield, the highest peak in the state of Vermont (Figure 2 -[left] Recent rock fall activity on the west side of Smugglers’ Notch. Photo by George Springston, August 2006.). A short presentation at each site will precede field explorations. Maps and summary documentation will be
provided to all participants. 5
Title: Geology of Western Vermont Leader: Marjorie Gale
Date: September 17, 2019; 9:00 am – 2:00 pm
www.aipg.org 5
Marjorie is the State Geologist and Director of the Vermont Geological Survey. She joined the VGS in 1996 and is co-author of the Bedrock Geologic Map of Vermont
(2011). She spent most of her career mapping bedrock, developing groundwater resource maps, working on GIS projects, and doing outreach. She now directs programs which focus on mapping, groundwater and hazards.t
Description: The trip will provide an overview of the bedrock geology of western Vermont. We will visit sites in different lithotectonic slices of Vermont including the autochthonous rocks in the Champlain Lowlands, the Cheshire quartzite on the upper plate of the Champlain Thrust, and metamorphosed clastic rocks near the crest of the Green Mountains. The trip begins in Ordovician rocks intruded by Cretaceous dikes on the shores of Lake Champlain (elev.~100’) and ends in the Cambrian rocks at Appalachian Gap (elev.~2375’).
Apr.May.Jun 2019 • TPG 5 3 Figure 2 5 4
4
Figure 1
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64
