Wow! these cross-fingers worked! What an amazing trip! Even better than pure-blue skies, there were enough puffy clouds and mixed…2022 | Richard Carstensen | Landforms class archives
‘Flesh’ atop of the ‘bones’ of bedrock geology
The Surficial geology section is divided into:
Explore those sub-categories or find general information below, scrolling through links under In this section. Note that there are relatively few, because surficial geology is a pretty broad topic. If, for example, a journal or report focused mostly on alluvial landforms, it’ll be listed instead with resources on that more focused category page.
You can also view the entire JuneauNature hierarchy at this site map.
Surficial geology is the study of loose, unconsolidated material overlying the bedrock foundation. These layers were deposited, rearranged and eroded by glaciers, fluctuating sea level, streams, landslides, and bulldozers. While bedrock geologists tend to think in time-frames of millions of years, the surficial story is usually faster paced, taking place over millennia and mere centuries.
While bedrock geologists tend to think in time-frames of millions of years, the surficial story is usually faster paced, taking place over millennia and mere centuries. On the surficial geology map, I’ve divided landforms into 5 age groups. In the pop-ups, these are listed in the ‘geol_age’ field:
- triassic: applied only to a couple bare-bedrock roches moutonees near Mendenhall Glacier
- early holocene: marine, glacial and alluvial formations dating back to shortly after the great ice age, ~10,000 years ago
- neoglacial: dating to just the last few millennia
- little ice age: mostly formed since peak of the last glacial advance in the mid-1700s
- anthropocene: built or excavated features mostly since 1950.
In this section
Custom geopdfs for Áak’w On our first class, we loaded the navigational app Avenza to our phones, and tested out…2022 | Richard Carstensen | pair of geopdfs
Four days at the delta and Eaglecrest From June 9 to 12, 2022, Discovery gave the 4th in our series…2022 | Richard Carstensen | 46 page journal
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
Background paper for 3 banners commissioned by the Juneau Douglas City Museum, showing changes to iconic landscapes of Áak’w Aaní…2017 | Richard Carstensen | 41 Pages
View larger map To begin mapping surficial geology in 2015, I used landform types and color-scheme from R.D. Miller, USGS,…2015: update 2022 | Richard Carstensen | Arc Online
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 (& 6-page digital download, 2023)