20,000 years of icework, and its expression on the land

At Juneau, marine sediments dating to 13,000 BP have been found at 750 feet above sea level. Considering world sea level was more than 300 feet lower at that time, this represents more than 1000 feet of land depression under heavy ice.

mend historic

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Auke Lake Trail Interpretive Signs

This three-part sign array offers information on the natural history, geology, and bio-culture of the Auke Lake Trail. You can download the three signs below:

Introduction (3MB): PDF_Download

Geology (2MB): PDF_Download

Bioculture (2MB): PDF_Download

 

Glacial History and Landforms

From Richard Carstensen, 2013:

mend historic

At Juneau, marine sediments dating to 13,000 BP have been found at 750 feet above sea level. Considering world sea level was more than 300 feet lower at that time, this represents more than 1000 feet of land depression under heavy ice.

 

 

Herbert Glacier Trail

The Herbert and neighboring Eagle Glaciers advanced and receded synchronously with the much better known Mendenhall. They’ve always been strenuous hikes, but recession off their floodplains up into rugged hills makes them annually more challenging destinations. Fortunately for those of us with ever gimpier knees, you can now ride much of the way to Herbert Glacier on a bicycle.

Trail to Herbert Glacier, with dated recessional moraines from the work of Donald Lawrence. Yellow circles show successional stages where we collected fungi in 1984.

Trail to Herbert Glacier, with dated recessional moraines from the work of Donald Lawrence. Yellow circles show successional stages where we collected fungi in 1984.

Mendenhall Glacier: Aerial Perspectives

This booklet of maps and images spanning the past century shows the Mendenhall Glacier’s retreat and the forest succession, while also providing information on the area’s geology.  The Mendenhall Glacier was the destination selected by the Glacier habitat group of the STREAM: Pedagogy of Place Institute, July 17-19, 2013.  You’ll find information about bedrock geology and surficial geology, and you’ll also find historical photographs of the Mendenhall.

Download Here (5MB): PDF_Download

 

 

Montana Creek Interpretive Signs

This three-part sign array offers information on the natural history, geology, and bio-culture of Montana Creek. You can download the three signs below:

Introduction (2.3MB):PDF_Download

Geology (1.5MB):PDF_Download

Bioculture (2.7MB):PDF_Download

 

Natural History of Montana Creek

This guide to the Montana Creek is part of a series by Richard Carstensen on Juneau watersheds.  A walk along the trail guide’s 11 stations is a lesson in succession, as the river’s twists and turns follow the recent deglaciation and forest growth in the Mendenhall Valley.

Download here (2MB): PDF_Download

 

Reading Southeast Alaska’s Landscape

$10.00

This book tells the constantly evolving story of geology in our region.  It tracks how bedrock forms, how glaciers wax and wane, and how rivers and the sea shape our land.  While the book offers a general introduction to bedrock and surficial geology, it also focuses in on regional geologic highlights.  It is a must-have for nature enthusiasts in Southeast.

 

 

Wildlife “Out the Road”

This is a report from Richard Carstensen  to the Southeast Alaska Land Trust on habitats and wildlife use of glacially-rebounding valleys from 25 to 28-mile Glacier Highway in Juneau. They call this area “risen valleys,” and in the report you can trace animal use and habitat descriptions for this remarkable portion of Southeast Alaska. This report contains extensive habitat descriptions, photographs, and animal descriptions.

Download Here (4.2MB): PDF_Download