Chad Yost
@phytolithologist.bsky.social
Assistant Professor of Geosciences at Indiana State University, Terre Haute, Indiana, USA. Paleoecologist, micro-archaeobotanist, phytolithologist, gardener, fiddler, father
Grades are submitted! It's such a relief to see ZERO Canvas app notifications. Best of all, for the first time in 4 years, I have no new course preps next semester. I can actually enjoy winter break! Applied Time Series Analysis was my new prep last semester, and it was brutal, but I'm proud of it!
December 18, 2024 at 4:37 PM
Grades are submitted! It's such a relief to see ZERO Canvas app notifications. Best of all, for the first time in 4 years, I have no new course preps next semester. I can actually enjoy winter break! Applied Time Series Analysis was my new prep last semester, and it was brutal, but I'm proud of it!
November 26, 2024 at 12:08 PM
Yet another cool tool!
November 25, 2024 at 2:32 PM
Yet another cool tool!
I just switched my professional/ research social presence from the dumpster fire formerly known as Twitter. Here’s a little blue sky from my back yard this past summer.
November 18, 2024 at 3:52 PM
I just switched my professional/ research social presence from the dumpster fire formerly known as Twitter. Here’s a little blue sky from my back yard this past summer.
A visit to Friedrich the Great’s summer residence in Potsdam, Germany before the start of the @icdpDrilling conference @GFZ_Potsdam
November 22, 2024 at 9:44 AM
A visit to Friedrich the Great’s summer residence in Potsdam, Germany before the start of the @icdpDrilling conference @GFZ_Potsdam
Having fun with #phytoliths and ChatGPT
November 22, 2024 at 9:44 AM
Having fun with #phytoliths and ChatGPT
Is #ModernReferenceMonday a thing? #Kava (Piper methysticum var. kalihi) tabular facetate leaf #phytoliths. This plant was grown, collected, and sent to me from Hawaiʻi for an archaeological/ancient agriculture project I worked on several years ago.
November 22, 2024 at 9:44 AM
Is #ModernReferenceMonday a thing? #Kava (Piper methysticum var. kalihi) tabular facetate leaf #phytoliths. This plant was grown, collected, and sent to me from Hawaiʻi for an archaeological/ancient agriculture project I worked on several years ago.
I’m growing Oaxacan green dent corn in a plot at the ISU community garden this summer for #phytolith, and #starchgranule reference material. We will be looking at phytolith and starch degradation after grinding, #nixtamalization, and cooking steps. @EESatISU @indianastate
November 22, 2024 at 9:50 AM
I’m growing Oaxacan green dent corn in a plot at the ISU community garden this summer for #phytolith, and #starchgranule reference material. We will be looking at phytolith and starch degradation after grinding, #nixtamalization, and cooking steps. @EESatISU @indianastate
#FossilFriday ~300 Ma black shale with a fossilized #bryozoan (cf. Rhombopora sp.) and a few lithified coal clasts. Found in a creek bed when hiking with the family a few weeks ago here in Vigo Co, IN - USA. Cleaned this up with bleach, H2O rinse, and then 10% HCl. #carboniferous
November 22, 2024 at 9:50 AM
#FossilFriday ~300 Ma black shale with a fossilized #bryozoan (cf. Rhombopora sp.) and a few lithified coal clasts. Found in a creek bed when hiking with the family a few weeks ago here in Vigo Co, IN - USA. Cleaned this up with bleach, H2O rinse, and then 10% HCl. #carboniferous
I was making some #phytolith microscope slides at home and ran out of the fingernail polish that I use to seal coverslips. My wife said “I have some, but it’s like 20 years old.” It was my preferred brand for slide making! #Wet_n_Wild
November 22, 2024 at 9:50 AM
I was making some #phytolith microscope slides at home and ran out of the fingernail polish that I use to seal coverslips. My wife said “I have some, but it’s like 20 years old.” It was my preferred brand for slide making! #Wet_n_Wild
The paleoenvironmental side of this study got its start in a 2017 seminar on defining and quantifying environmental variability led by Andy Cohen and Anne B. at the U of Arizona. @jjrowan_paleo and Andrew Du applied their genius to the mammalian...
November 22, 2024 at 9:50 AM
The paleoenvironmental side of this study got its start in a 2017 seminar on defining and quantifying environmental variability led by Andy Cohen and Anne B. at the U of Arizona. @jjrowan_paleo and Andrew Du applied their genius to the mammalian...
Had a great time visiting @Uconn last week for an invited talk in the @UConnAnthro department cosponsored by @UConnGeoscience. #phytoliths #microcharcoal @HSPDPinfo @EESatISU
November 22, 2024 at 9:55 AM
Had a great time visiting @Uconn last week for an invited talk in the @UConnAnthro department cosponsored by @UConnGeoscience. #phytoliths #microcharcoal @HSPDPinfo @EESatISU
This study looked at modern and paleolake sediments from the @HSPDP WTK core. An interesting finding from the paleo study: as precipitation increased, so did fire, often at precessional periodicity. This is explained by an increase in grass biomass and species adapted to fire.
November 22, 2024 at 10:14 AM
This study looked at modern and paleolake sediments from the @HSPDP WTK core. An interesting finding from the paleo study: as precipitation increased, so did fire, often at precessional periodicity. This is explained by an increase in grass biomass and species adapted to fire.
This was my first phytolith and microcharcoal dataset completed for the diss, but the last published because of challenges posed by a discontinuous #phytolith record. However, by combining the #microcharcoal record with @loopdlupien‘s fabulous #dDwax record, it all worked out.
November 22, 2024 at 10:08 AM
This was my first phytolith and microcharcoal dataset completed for the diss, but the last published because of challenges posed by a discontinuous #phytolith record. However, by combining the #microcharcoal record with @loopdlupien‘s fabulous #dDwax record, it all worked out.
Here's another page I made for a micro/macro #archaeobotany calendar from 2013 (see 1/11/21 post). I'm teaching a course on #microfossils in the Earth and archaeological sciences this semester @EESatISU, so I thought I'd recycle this artwork for the sponge lecture. #silicasponges
November 22, 2024 at 10:08 AM
Here's another page I made for a micro/macro #archaeobotany calendar from 2013 (see 1/11/21 post). I'm teaching a course on #microfossils in the Earth and archaeological sciences this semester @EESatISU, so I thought I'd recycle this artwork for the sponge lecture. #silicasponges
Years ago when I was working as a micro-#archaeobotanist for a private firm, we made calendars as gifts for clients. Each analyst selected a topic for several of the months. Here’s my creation featuring #phytoliths and #starchgranules from a #sedge.
November 22, 2024 at 10:14 AM
Years ago when I was working as a micro-#archaeobotanist for a private firm, we made calendars as gifts for clients. Each analyst selected a topic for several of the months. Here’s my creation featuring #phytoliths and #starchgranules from a #sedge.
Although our approach was not successful at identifying differences between essentially modern Southwest maize landraces, future studies that include morphometrics from areas in addition to or in combination with the outer periclinal surface (OPS) may prove more discriminating.
November 22, 2024 at 10:40 AM
Although our approach was not successful at identifying differences between essentially modern Southwest maize landraces, future studies that include morphometrics from areas in addition to or in combination with the outer periclinal surface (OPS) may prove more discriminating.
…we could not discriminate between 24 landraces of maize. This was not surprising since genetic differences were not clearly reflected in MDS space for cultural affiliation/geography (none), and endosperm type (some). Our phytolith morphometries show no clustering in MDS space.
November 22, 2024 at 10:33 AM
…we could not discriminate between 24 landraces of maize. This was not surprising since genetic differences were not clearly reflected in MDS space for cultural affiliation/geography (none), and endosperm type (some). Our phytolith morphometries show no clustering in MDS space.
We set out to answer two main questions: 1) exactly what #maizecob parts produce rondel phytoliths (this was not clear in the literature), and 2) can we use computer-assisted #morphometricanalysis (CAMA) of cob rondel phytoliths to identify 24 southwestern maize #landraces.
November 22, 2024 at 10:21 AM
We set out to answer two main questions: 1) exactly what #maizecob parts produce rondel phytoliths (this was not clear in the literature), and 2) can we use computer-assisted #morphometricanalysis (CAMA) of cob rondel phytoliths to identify 24 southwestern maize #landraces.
Proud this paper on #maize cob phytolith morphometrics is out, with most of the credit going to my fabulous #phytolith and #archaeobotany specialist coauthors (none of whom are on Twitter). Free download with this link until Feb 12. https://authors.elsevier.com/a/1cIDm_,5MKX9Yux
November 22, 2024 at 10:14 AM
Proud this paper on #maize cob phytolith morphometrics is out, with most of the credit going to my fabulous #phytolith and #archaeobotany specialist coauthors (none of whom are on Twitter). Free download with this link until Feb 12. https://authors.elsevier.com/a/1cIDm_,5MKX9Yux
Excited my copy arrived today @AmandaGHenry! The authors have had the pdf for awhile, but I still like having a hardcopy of pubs like this! Also excited to teach from this next semester with @DiatomsATTACK for a class called #Microfossils in the Earth and Anthropological Sciences
November 22, 2024 at 10:14 AM
Excited my copy arrived today @AmandaGHenry! The authors have had the pdf for awhile, but I still like having a hardcopy of pubs like this! Also excited to teach from this next semester with @DiatomsATTACK for a class called #Microfossils in the Earth and Anthropological Sciences
Sometimes the accuracy of YuJa’s auto-captioning leaves something to be desired. Maybe I need to annunciate more clearly? #autocaptioningblues #pandemiclectures #hesaidwhat?
November 22, 2024 at 10:21 AM
Sometimes the accuracy of YuJa’s auto-captioning leaves something to be desired. Maybe I need to annunciate more clearly? #autocaptioningblues #pandemiclectures #hesaidwhat?