Bedrock geology is a vast subject. Of greatest interest to naturalists are ways in which underlying rock types, alignments, fracture patterns, and variable resistance to erosion explain the shape of the land and the distribution of natural communities.

Here are some of the common bedrock types of Southeast Alaska.

Bedrock Geology

In this section

Nature near the schools: Landforms

Powerpoint & script for Discovery Nature Studies I didn’t come to geology by natural inclination. I was gently nudged by…

1990 | Richard Carstensen | powerpoint & script

Chilkat bedrock geology.

Rock-type units from USGS Here’s a geology map for field navigation in more accessible portions of the Greater Chilkat Watershed—US…

2020 | Richard Carstensen | geopdf—10MB—& 5-page draft chapter

Blackwell City Walk: info packet

Another great idea from Mike Cathy Connor and I (Richard Carstensen) have inherited a tradition spearheaded by our friend Mike…

2019 | Mike Blackwell, Richard Carstensen & Cathy Connor | 27 pages

Mid-May on Shaa Tlaax

Goats, geology & zonation on Shaa Tlaax, moldy top (Mt Juneau) Video-journal of the flora, fauna, and geomorphology that hikers…

2019 | Richard Carstensen | 4 minutes

Geopdfs Gold geology

High-resolution GeoPDF pair for field navigation in Dzantik’i Héeni (Gold Creek) watershed. In apps such as Avenza, on your phone…

2019 | Richard Carstensen | 2 geopdfs

Kaxdigoowu Héen (Montana Creek): presentation for SEAL Trust

Slideshow in two parts Kaxdigoowu Héen, going back clearwater has been one of my favorite places since I first explored…

2019 | Richard Carstensen & John Hudson | slide show in 2 parts: 38 & 22 minutes

Bedrock geology ArcGIS Online

Bedrock geology for Áak’w & T’aakú Aaní. Units based upon a shapefile by USGS, but color coded by 6 broad…

2015 | Richard Carstensen |

Natural history of Juneau trails: A watershed approach

Guide to natural and cultural history of the CBJ, summarizing Discovery’s longterm study on contract with Parks & Recreation that…

2013 | Richard Carstensen | 72 pages

Reading Southeast Alaska’s landscape

How bedrock foundations, glaciers, rivers and sea shape the land How bedrock influences the shape of mountains and coastal landforms.…

2013 | Cathy Connor|Richard Carstensen | 28 pages

2011 spring newsletter: Geology and life

Connections between the living and non-living world Feature article on response of flora and fauna to geologic landforms and bedrock…

Spring 2011 | Richard Carstensen | 12 pages