Optical mineralogy tutorial videos
Hi everyone,
I know it’s kind of late for this, but I’m starting to post some videos illustrating typical minerals in thin section. This is a little like the videos I’ve been posting all semester, except the new videos are specific to a particular mineral (e.g., chlorite). Each video shows multiple examples covering a range of characteristics (e.g., different chlorite textures, interference colors, etc.), and I provide voiceover commentary of what I look for.
My thought was that students could first view the tutorial videos (OK, now they should know what chlorite looks like), then look at the videos of unknown rocks to identify the minerals.
Here’s the link to the tutorial playlist:
https://www.youtube.com/playlist?list=PL8dDgAwuMuPTSlYx3GPlNxQ6KX1ceAQsE https://www.youtube.com/playlist?list=PL8dDgAwuMuPTSlYx3GPlNxQ6KX1ceAQsE
There are 6 of these right now: quartz, plagioclase, garnet, biotite, chlorite, and sillimanite (who’s the metamorphic petrologist?). Epidote group should be done by tomorrow, but the high-def versions take a little while to post. I show optic figures for quartz and sillimanite. I’ll have one for muscovite also. Eventually, I’ll make videos on pleochroism, relief, twins, etc.
For the unknowns, I ended up posting 180 videos (about 85 rocks; most have multiple videos). The guide for what’s in the rocks should be up to date. Send me a direct email if you’re an instructor and want that link.
I’m thinking of posting videos for my students' final exam next week. Maybe some of you could use the unknowns videos for this, too? The tutorials videos might be helpful reviews for lab finals.
Happy end of the semester (for those of you on semesters),
Matt
Shoot - I forgot: I also added “chapters” to the tutorial videos. Look for these in the description box, you’ll have to “Show More” to see them all. If you click on a particular time stamp, the video will jump to that section. So, for example, if you want to see the acute bisectrix of sillimanite, you can click on the last time stamp in the tutorial description box and the video will go straight there.
That way, you don’t have to listen to me drone on about fibrolite or sillimanite pseudomorphs after andalusite (although they are quite impressive…)
Best,
Matt
On Apr 29, 2021, at 6:49 PM, Matt Kohn mattkohn@boisestate.edu wrote:
Hi everyone,
I know it’s kind of late for this, but I’m starting to post some videos illustrating typical minerals in thin section. This is a little like the videos I’ve been posting all semester, except the new videos are specific to a particular mineral (e.g., chlorite). Each video shows multiple examples covering a range of characteristics (e.g., different chlorite textures, interference colors, etc.), and I provide voiceover commentary of what I look for.
My thought was that students could first view the tutorial videos (OK, now they should know what chlorite looks like), then look at the videos of unknown rocks to identify the minerals.
Here’s the link to the tutorial playlist:
https://www.youtube.com/playlist?list=PL8dDgAwuMuPTSlYx3GPlNxQ6KX1ceAQsE https://www.youtube.com/playlist?list=PL8dDgAwuMuPTSlYx3GPlNxQ6KX1ceAQsE
There are 6 of these right now: quartz, plagioclase, garnet, biotite, chlorite, and sillimanite (who’s the metamorphic petrologist?). Epidote group should be done by tomorrow, but the high-def versions take a little while to post. I show optic figures for quartz and sillimanite. I’ll have one for muscovite also. Eventually, I’ll make videos on pleochroism, relief, twins, etc.
For the unknowns, I ended up posting 180 videos (about 85 rocks; most have multiple videos). The guide for what’s in the rocks should be up to date. Send me a direct email if you’re an instructor and want that link.
I’m thinking of posting videos for my students' final exam next week. Maybe some of you could use the unknowns videos for this, too? The tutorials videos might be helpful reviews for lab finals.
Happy end of the semester (for those of you on semesters),
Matt
Matt, those videos are great. When are you going to make more? Seriously, I know how much work it takes to create things like this and we are all very appreciative. I am sure your videos will be widely used.
For a companion web site, you might want to check out something I created a long time ago at
http://sites.und.edu/dexter.perkins/opticalmin/
Dexter Perkins
Dept. Geology and Geological Engineering
University of North Dakota
Grand Forks ND 58202
(701)777-2991o; (701)757-0579h
dexter.perkins@engr.und.edu
From: Matt Kohn via MSA-talk msa-talk@minlists.org
Sent: Thursday, April 29, 2021 7:56 PM
To: msa-talk@minlists.org msa-talk@minlists.org; Metamorphic Studies Group GEO-METAMORPHISM@JISCMAIL.AC.UK
Subject: [MSA-talk] Re: Optical mineralogy tutorial videos
Shoot - I forgot: I also added “chapters” to the tutorial videos. Look for these in the description box, you’ll have to “Show More” to see them all. If you click on a particular time stamp, the video will jump to that section. So, for example, if you want to see the acute bisectrix of sillimanite, you can click on the last time stamp in the tutorial description box and the video will go straight there.
That way, you don’t have to listen to me drone on about fibrolite or sillimanite pseudomorphs after andalusite (although they are quite impressive…)
Best,
Matt
On Apr 29, 2021, at 6:49 PM, Matt Kohn <mattkohn@boisestate.edumailto:mattkohn@boisestate.edu> wrote:
Hi everyone,
I know it’s kind of late for this, but I’m starting to post some videos illustrating typical minerals in thin section. This is a little like the videos I’ve been posting all semester, except the new videos are specific to a particular mineral (e.g., chlorite). Each video shows multiple examples covering a range of characteristics (e.g., different chlorite textures, interference colors, etc.), and I provide voiceover commentary of what I look for.
My thought was that students could first view the tutorial videos (OK, now they should know what chlorite looks like), then look at the videos of unknown rocks to identify the minerals.
Here’s the link to the tutorial playlist:
https://www.youtube.com/playlist?list=PL8dDgAwuMuPTSlYx3GPlNxQ6KX1ceAQsE
There are 6 of these right now: quartz, plagioclase, garnet, biotite, chlorite, and sillimanite (who’s the metamorphic petrologist?). Epidote group should be done by tomorrow, but the high-def versions take a little while to post. I show optic figures for quartz and sillimanite. I’ll have one for muscovite also. Eventually, I’ll make videos on pleochroism, relief, twins, etc.
For the unknowns, I ended up posting 180 videos (about 85 rocks; most have multiple videos). The guide for what’s in the rocks should be up to date. Send me a direct email if you’re an instructor and want that link.
I’m thinking of posting videos for my students' final exam next week. Maybe some of you could use the unknowns videos for this, too? The tutorials videos might be helpful reviews for lab finals.
Happy end of the semester (for those of you on semesters),
Matt
I second Dexter’s message! Thank you for sharing this valuable resource, Matt! Your willingness to allow all of us to benefit from your hard work is very much appreciated. I hope you will be formally recognized in some way for this contribution.
And, Dexter, I have used your optical site extensively in my Mineralogy class. It really helps the students as they learn mineral identical in thin section, and was especially crucial for Fall 2020 as we were doing so much online. Thanks to you too!
Best,
Cam
On Apr 30, 2021, at 10:47 AM, Perkins, Dexter via MSA-talk msa-talk@minlists.org wrote:
Matt, those videos are great. When are you going to make more? Seriously, I know how much work it takes to create things like this and we are all very appreciative. I am sure your videos will be widely used.
For a companion web site, you might want to check out something I created a long time ago at
http://sites.und.edu/dexter.perkins/opticalmin/ http://sites.und.edu/dexter.perkins/opticalmin/
Dexter Perkins
Dept. Geology and Geological Engineering
University of North Dakota
Grand Forks ND 58202
(701)777-2991o; (701)757-0579h
dexter.perkins@engr.und.edu mailto:dexter.perkins@engr.und.edu
From: Matt Kohn via MSA-talk <msa-talk@minlists.org mailto:msa-talk@minlists.org>
Sent: Thursday, April 29, 2021 7:56 PM
To: msa-talk@minlists.org mailto:msa-talk@minlists.org <msa-talk@minlists.org mailto:msa-talk@minlists.org>; Metamorphic Studies Group <GEO-METAMORPHISM@JISCMAIL.AC.UK mailto:GEO-METAMORPHISM@JISCMAIL.AC.UK>
Subject: [MSA-talk] Re: Optical mineralogy tutorial videos
Shoot - I forgot: I also added “chapters” to the tutorial videos. Look for these in the description box, you’ll have to “Show More” to see them all. If you click on a particular time stamp, the video will jump to that section. So, for example, if you want to see the acute bisectrix of sillimanite, you can click on the last time stamp in the tutorial description box and the video will go straight there.
That way, you don’t have to listen to me drone on about fibrolite or sillimanite pseudomorphs after andalusite (although they are quite impressive…)
Best,
Matt
On Apr 29, 2021, at 6:49 PM, Matt Kohn <mattkohn@boisestate.edu mailto:mattkohn@boisestate.edu> wrote:
Hi everyone,
I know it’s kind of late for this, but I’m starting to post some videos illustrating typical minerals in thin section. This is a little like the videos I’ve been posting all semester, except the new videos are specific to a particular mineral (e.g., chlorite). Each video shows multiple examples covering a range of characteristics (e.g., different chlorite textures, interference colors, etc.), and I provide voiceover commentary of what I look for.
My thought was that students could first view the tutorial videos (OK, now they should know what chlorite looks like), then look at the videos of unknown rocks to identify the minerals.
Here’s the link to the tutorial playlist:
https://www.youtube.com/playlist?list=PL8dDgAwuMuPTSlYx3GPlNxQ6KX1ceAQsE https://www.youtube.com/playlist?list=PL8dDgAwuMuPTSlYx3GPlNxQ6KX1ceAQsE
There are 6 of these right now: quartz, plagioclase, garnet, biotite, chlorite, and sillimanite (who’s the metamorphic petrologist?). Epidote group should be done by tomorrow, but the high-def versions take a little while to post. I show optic figures for quartz and sillimanite. I’ll have one for muscovite also. Eventually, I’ll make videos on pleochroism, relief, twins, etc.
For the unknowns, I ended up posting 180 videos (about 85 rocks; most have multiple videos). The guide for what’s in the rocks should be up to date. Send me a direct email if you’re an instructor and want that link.
I’m thinking of posting videos for my students' final exam next week. Maybe some of you could use the unknowns videos for this, too? The tutorials videos might be helpful reviews for lab finals.
Happy end of the semester (for those of you on semesters),
Matt
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To unsubscribe send an email to msa-talk-leave@minlists.org mailto:msa-talk-leave@minlists.org
Hi everyone,
Although I’ve posted about this previously, for the benefit of anyone new to the list I’d also like to mention that over the years I too have uploaded a collection of “specific mineral in thin section” videos. Each video is ~30 sec long (there’s no narration), and for each mineral sample there’s a grouped set of 3-4 videos: lower polarizer rotation in PPL, stage rotation in PPL, stage rotation in XP, and finally an optic figure video (for anisotropic minerals only) ending in either the insertion of a gypsum plate or occasionally a quartz wedge. These are all available on my mineralogy/petrology website (see links below).
There are now over 1000 videos covering close to 300 minerals, and include not only most of the common minerals, but also numerous rare species and unusual compositional variants of more common species (confirmed by microprobe). For some minerals I have multiple examples from different rock types or in different assemblages. In addition to their collection at https://www.rockptx.com/video-atlas-of-minerals-in-thin-section/ grouped mineralogically, I’m in the ongoing process of also having each video set additionally accompany its specific parent scanned thin section on the various https://www.rockptx.com/thin-section-scans/ pages, where I’m also adding written commentary on each mineral's characteristic optical properties to differentiate it from other minerals in the sample. This has been a slow process, and at present the earlier pages are more complete than the later pages. Also on the “thin section scan” pages are tables of mineral compositional data for many (but not yet all) of the featured samples… this too has been a slow ongoing process, but has been growing as I get time (and more importantly funds) to play on the microprobe.
Frank
On 30 Apr 2021, at 08:21:22, Catherine Macris via MSA-talk <msa-talk@minlists.orgmailto:msa-talk@minlists.org> wrote:
External Email
I second Dexter’s message! Thank you for sharing this valuable resource, Matt! Your willingness to allow all of us to benefit from your hard work is very much appreciated. I hope you will be formally recognized in some way for this contribution.
And, Dexter, I have used your optical site extensively in my Mineralogy class. It really helps the students as they learn mineral identical in thin section, and was especially crucial for Fall 2020 as we were doing so much online. Thanks to you too!
Best,
Cam
On Apr 30, 2021, at 10:47 AM, Perkins, Dexter via MSA-talk <msa-talk@minlists.orgmailto:msa-talk@minlists.org> wrote:
Matt, those videos are great. When are you going to make more? Seriously, I know how much work it takes to create things like this and we are all very appreciative. I am sure your videos will be widely used.
For a companion web site, you might want to check out something I created a long time ago at
http://sites.und.edu/dexter.perkins/opticalmin/
Dexter Perkins
Dept. Geology and Geological Engineering
University of North Dakota
Grand Forks ND 58202
(701)777-2991o; (701)757-0579h
dexter.perkins@engr.und.edumailto:dexter.perkins@engr.und.edu
From: Matt Kohn via MSA-talk <msa-talk@minlists.orgmailto:msa-talk@minlists.org>
Sent: Thursday, April 29, 2021 7:56 PM
To: msa-talk@minlists.orgmailto:msa-talk@minlists.org <msa-talk@minlists.orgmailto:msa-talk@minlists.org>; Metamorphic Studies Group <GEO-METAMORPHISM@JISCMAIL.AC.UKmailto:GEO-METAMORPHISM@JISCMAIL.AC.UK>
Subject: [MSA-talk] Re: Optical mineralogy tutorial videos
Shoot - I forgot: I also added “chapters” to the tutorial videos. Look for these in the description box, you’ll have to “Show More” to see them all. If you click on a particular time stamp, the video will jump to that section. So, for example, if you want to see the acute bisectrix of sillimanite, you can click on the last time stamp in the tutorial description box and the video will go straight there.
That way, you don’t have to listen to me drone on about fibrolite or sillimanite pseudomorphs after andalusite (although they are quite impressive…)
Best,
Matt
On Apr 29, 2021, at 6:49 PM, Matt Kohn <mattkohn@boisestate.edumailto:mattkohn@boisestate.edu> wrote:
Hi everyone,
I know it’s kind of late for this, but I’m starting to post some videos illustrating typical minerals in thin section. This is a little like the videos I’ve been posting all semester, except the new videos are specific to a particular mineral (e.g., chlorite). Each video shows multiple examples covering a range of characteristics (e.g., different chlorite textures, interference colors, etc.), and I provide voiceover commentary of what I look for.
My thought was that students could first view the tutorial videos (OK, now they should know what chlorite looks like), then look at the videos of unknown rocks to identify the minerals.
Here’s the link to the tutorial playlist:
https://www.youtube.com/playlist?list=PL8dDgAwuMuPTSlYx3GPlNxQ6KX1ceAQsE
There are 6 of these right now: quartz, plagioclase, garnet, biotite, chlorite, and sillimanite (who’s the metamorphic petrologist?). Epidote group should be done by tomorrow, but the high-def versions take a little while to post. I show optic figures for quartz and sillimanite. I’ll have one for muscovite also. Eventually, I’ll make videos on pleochroism, relief, twins, etc.
For the unknowns, I ended up posting 180 videos (about 85 rocks; most have multiple videos). The guide for what’s in the rocks should be up to date. Send me a direct email if you’re an instructor and want that link.
I’m thinking of posting videos for my students' final exam next week. Maybe some of you could use the unknowns videos for this, too? The tutorials videos might be helpful reviews for lab finals.
Happy end of the semester (for those of you on semesters),
Matt
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To unsubscribe send an email to msa-talk-leave@minlists.orgmailto:msa-talk-leave@minlists.org
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Frank K. Mazdab
analytical mineralogist
Department of Geosciences
1040 E. 4th St., Gould-Simpson Bldg. (Bldg. 77)
University of Arizona
Tucson, AZ 85721
fmazdab@arizona.edumailto:fmazdab@arizona.edu
office: rm 342 Gould-Simpson Bldg.
In a democracy it’s your vote that counts. In feudalism it’s your count that votes.
Hi again,
Thanks for all your kind words.
At the following link, you can find all the videos I’ve posted, including playlists that organize them according to topic. That’s useful if you’re looking for a volcanic rock vs. a metapelite:
https://www.youtube.com/channel/UC_hMpllR88i2uZbQ4S1OPhQ https://www.youtube.com/channel/UC_hMpllR88i2uZbQ4S1OPhQ
There are various other videos there, too. Help yourself to whatever you want.
The key I mentioned for the unknowns is a separate Google sheets document. Contact me offlist for access to that.
All the best,
Matt
On Apr 29, 2021, at 6:49 PM, Matt Kohn mattkohn@boisestate.edu wrote:
Hi everyone,
I know it’s kind of late for this, but I’m starting to post some videos illustrating typical minerals in thin section. This is a little like the videos I’ve been posting all semester, except the new videos are specific to a particular mineral (e.g., chlorite). Each video shows multiple examples covering a range of characteristics (e.g., different chlorite textures, interference colors, etc.), and I provide voiceover commentary of what I look for.
My thought was that students could first view the tutorial videos (OK, now they should know what chlorite looks like), then look at the videos of unknown rocks to identify the minerals.
Here’s the link to the tutorial playlist:
https://www.youtube.com/playlist?list=PL8dDgAwuMuPTSlYx3GPlNxQ6KX1ceAQsE https://www.youtube.com/playlist?list=PL8dDgAwuMuPTSlYx3GPlNxQ6KX1ceAQsE
There are 6 of these right now: quartz, plagioclase, garnet, biotite, chlorite, and sillimanite (who’s the metamorphic petrologist?). Epidote group should be done by tomorrow, but the high-def versions take a little while to post. I show optic figures for quartz and sillimanite. I’ll have one for muscovite also. Eventually, I’ll make videos on pleochroism, relief, twins, etc.
For the unknowns, I ended up posting 180 videos (about 85 rocks; most have multiple videos). The guide for what’s in the rocks should be up to date. Send me a direct email if you’re an instructor and want that link.
I’m thinking of posting videos for my students' final exam next week. Maybe some of you could use the unknowns videos for this, too? The tutorials videos might be helpful reviews for lab finals.
Happy end of the semester (for those of you on semesters),
Matt