Spring 2020

Section 4810 of GEOL1
The Earth -- : Jan 14 - May 14 2020

Section 6442 of ENVS12
Introduction to Environmental Science -- : Jan 27 - May 06 2020
The above section has a mandatory online component. This is a Petaluma Transfer Track class and is open to all students. Transfer Track classes start late and end early and do not meet during finals week.

Section 7236 of GEOL1L
Geology Lab -- : Jan 16 - May 14 2020

Section 7727 of GEOL1
The Earth -- : Jan 13 - May 13 2020

Fall 2019

Section 2173 of GEOL20
Natural Disasters -- : Sep 06 - Sep 13 2019
The above section is a hybrid class with five meetings face to face and the remainder online. This section will meet in PC 211, Petaluma Campus, on the following Fridays: 9/6, 9/13, 10/4, 11/8 and 12/13. Students are required to have reliable access to a computer for the online component. This is a Petaluma Transfer Track class and is open to all students. Transfer Track classes start late and end early and do not meet during finals week. After registering for this class, click on the section number to find any available online course material.

Section 2465 of GEOL1
The Earth -- : Aug 19 - Dec 11 2019

Section 3696 of GEOL1
The Earth -- : Aug 21 - Dec 11 2019

Summer 2019

Section 8162 of GEOL1
The Earth -- : May 21 - May 23 2019
The Study Abroad Program will be traveling to Italy in the Summer 2019 semester. Students must apply and be accepted into the Study Abroad Program in order to enroll in these courses. For further information please visit the website at, or contact Patty Warne at or by phone at (707) 527-4441.

FALL 2019 semester
Pay careful attention to my Fall schedule as I am teaching both Regular semester courses (geology) and Transfer Track courses. i.e., late start courses (natural disasters.) Check the JC Schedule of courses website:


Regular semester (08/19-12/11)

GEOL1 section 2465 Mo-We 10:30-12:00 in classroom PC211

GEOL1 section 3696 Wed 6:00-9:00pm in classroom PC211

Text: Physical Geology, Steve Earle. Open access textboobk (i.e., it's free!) Link to the website:


Transfer Track semester (09/06-12/13)

GEOL20 section 2173. This is a hybrid course, with 5 face-to-face meetings (Friday 10am to 12 noon on 09/06, 09/13, 10/04, 11/08, 12/13) in PC211. The remainder of the course is online. 

Text: We have open source options that we'll discuss in class on the first day. 


We will be using CANVAS for all online course management including weekly online quizzes, wiki-pages, glossaries, exam scores (gradebook function), project submissions (via electronic uploads), and lecture pages for all classes.

Please check out the evolution of the Petaluma student garden on instagram.



Ph.D. Geological Oceanography, University of Rhode Island (2009)
B.Sc. HONS Geology, University of Tasmania (2004)
B.Sc. Geology, James Cook University (2003)

Academic Experience: 

2013 - _____: SRJC Petaluma
2010 - 2013: Visiting Assistant Professor, St. Lawrence University.
2009 - 2010: Postdoctoral Research, University of Rhode Island.
2004 - 2009: Ph.D. Research, University of Rhode Island.

I received my undergraduate degree from James Cook University, BSc Honours from the University of Tasmania in Australia, and completed my doctoral studies and post-doctoral research at the University of Rhode Island Graduate School of Oceanography. This research was focused on the explosive eruptions of Cerro Hudson in southern Chile. Geology has taken me to many places around the world including Argentina, Australia, the Canary Islands (Spain), Chile, Costa Rica, Greece, Italy, New Zealand, and throughout the USA.

I am very interested in sustainability and local food networks having worked on CSA farms, taught a resource sustainability course, and, most recently, worked with students to build and maintain a 250-gallon aquaponics system (symbiotic fish and plant production). I am working with other dedicated faculty and staff on sustainability issues on the Petaluma campus including planting fruit trees on campus as part of an edible landscape, permaculture gardens to replace lawns, a student run garden and greenhouse, and rain water harvesting projects.

In May 2015 student, faculty, staff and community volunteers worked in collaboration with Daily Acts to transform a 2700 sq ft section of lawn through sheet-mulching. In September, once the sheet mulch had killed the lawn and created a layer of organic material, we planted the new permaculture garden with a combination of fruit tress and drought tolerant species, and a steel lattice for our "green" outdoor classroom. Am very excited to see the garden "grow out" during the spring and summer months this year. This is a long-term project and will take years to fully establish. It's an edible landscape so feel free to pick the fruit when in season. Many thanks Friedman's Hardware, Team Ghilotti, and the City of Petaluma for support. Fall 2017 the City of Petaluma once again supported the garden sheet mulch program by providing everything needed to sheet mulch 11,000 sq ft of lawn (dead lawn) surrounding the garden. 

In 2015 I created a 'rock garden' on the Petaluma campus. Strategically located samples of sedimentary rocks (1 to 1 1/2 tonnes in size) form part of an interactive laboratory for students enrolled in GEOL1-LAB. Thanks to funding from the Friends of the Petaluma Campus we purchased the rock samples and, with much help from Art and Raph, have them installed. Fall 2017 funding was provided to increase the scope of the geology rock garden. Starting in Spring 2018 another 12 boulders will be added to campus, increasing the complexity of the structure the students have to map and identify.  

With the fantastic help of the SRJC Foundation we have secured funding and built much of the main infrastructure for a student-run garden and hoophouse on campus. Students will work in the garden during the course of the year and what produce is grown will be given to the students. A work-for-share CSA model. We had great help from Dr. Sellu's Intro to Plant Biology students in the Fall (2015) who built a temporary hoop-house, more raised beds, and planted winter crops. With the help of students from ENVS12 we have added another 10 raised beds to the garden in Spring 2016. We also installed full drip irrigation systems in 20 out of 30 beds with solar-powered timers. Many thanks to Friedman's Hardware, The Water's Edge Landscape Design, Berry's Sawmill, Cunningham Handyman Services, and SRJC Facilities for support.

Follow us on instagram here:

In 2016 a collaboration between Geology, Chemistry, Anthropology, and Biology received funding from the SRJC Foundation to purchase a 3D scanner and two 3D printers for the Petaluma Campus. Both are up and running and we're beginning to experiment with models. We have successfully printed a large DNA model for chemistry, solid of revolution models for math, skulls and artifacts for archeology and anthropology, and star wars blasters for fun! 

Most recently (Fall 2017) funding was secured to purchase wifi enabled wildlife cameras for the wildlife corridors on campus. Students from ENVS12 and NRM12 will be using the cameras to monitor activity on campus. The first phase in cataloging and characterizing wildlife on campus. Hopefully we get more that just photos of Bootsie!

ESS Dept also secured funding to build Virtual Reality Sandboxes for use in geography, geology, and environmental sciences classes. The VR sandbox projects contour lines and colors onto sand in real time allowing students to manipulate topography and instantly see the changes. Until we get ours up and running, here's a link to the UC Davis webpage describing the system:



Presentations and Publications: 


2017. Chiarenzelli J, Kratzmann DJ, Selleck B, deLorraine W, & Lupulescu M. Utility of Detrital Zircon Grains From Upper Amphibolite Facies Rocks of the Grenville Supergroup, Adirondack Lowlands, Northeastern United States p371-401 in Mazumder R (ed) Sediment Provenance: Influences on Compositional Change from Source to Sink. Elsevier Publishers. 

2015. Chiarenzelli J, Kratzmann DJ, Selleck B, & deLorraine W. Age and provenance of Grenville supergroup rocks, Trans-Adirondack Basin, constrained by detrital zircons. Geology. v43(2):183-186. doi:10.1130/G36372.1

2010. Kratzmann DJ, Carey S, Scasso R A & Naranjo J-A. Role of cryptic amphibole crystallization in magma differentiation at Hudson volcano, Southern Volcanic Zone, Chile. Contributions to Mineralogy and Petrology, v159(2):237-264.

2010. Kratzmann DJ, Carey SN, Fero J, Scasso R A & Naranjo J-A. Simulations of tephra dispersal from the 1991 explosive eruptions of Hudson volcano, Chile. Journal of Volcanology and Geothermal Research, v190:337-352.

2009. Kratzmann DJ, Carey S, Scasso R & Naranjo J-A. Compositional variations and magma mixing in the 1991 eruptions of Hudson volcano, Chile. Bulletin of Volcanology, v71:419- 439.

Recent Presentations (* denotes student author)

2014. Kratzmann DJ, Sullivan E. Do Students Who Finish Exams First Really do Better Than Those Who Finish Last? Student Perceptions of Exam Completion Times. GSA Annual Meeting, Poster 116.

2014. Selleck B, Chiarenzelli JR, Kratzmann DJ, Christoffersen P* & Durham A*. Detrital Zircon Geochronology and Provenance of Middle and Upper Devonian Strata, Northern Appalachian Basin of New York State. GSA Northeastern Section Meeting, Session 53-5.

2013. Chiarenzelli JR, Kratzmann DJ, Selleck B, Christoffersen P* & Durham A*. Constraining the Depositional History and Evolution of the Trans-Adirondack Back-Arc Basin Using Detrital Zircon Geochronology. GSA Annual Meeting, Session 322-2.

2013. Kratzmann DJ & Olendzenski LC. Experiential Learning Applications for an Aquaponics System: Inter-Disciplinary Geology-Biology Research and Teaching. Northeastern GSA Section Meeting, Poster 83-1. Abstracts with Programs, Vol. 45, No. 1, p. 144.

2013. Christoffersen P*, Kratzmann DJ & Chiarenzelli JR. Mylonite Reactivation and Brittle and Ductile Deformation within the Carthage-Colton Shear Zone at Stone Valley, Colton NY. Northeastern GSA Section Meeting, Poster 63-3. Abstracts with Programs, Vol. 45, No. 1, p. 119.

2011. Kandola SB*, Kratzmann DJ & Torrey L. GPVPlot: Simple and Efficient Graph Generation for Geochemical Data. GSA Annual Meeting, Poster 264. Abstracts with Programs, Vol. 43, No. 5, p. 621.

2010. Kratzmann DJ, Carey S, Scasso R & Naranjo J-A. Was the 1991 Eruption of Hudson Volcano, Chile, a Phreatoplinian Event? Evidence for Magma-Water Interaction. Cities on Volcanoes 6, Tenerife, Spain. Presentation 1.1-0-05.

2010. Kratzmann DJ, Carey S, Scasso R & Naranjo J-A. Evidence for synchronous hydromagmatic and primary degassing activity during the 1991 eruption of Hudson Volcano, Chile. AGU Fall Meeting 2010, poster NH11B-1127.

2009. Kratzmann DJ, Carey S, Fero J, Scasso R & Naranjo J-A. Simulations of tephra dispersal from the 1991 explosive eruptions of Hudson volcano, Chile. GSA Annual Meeting, Poster 161788.

2009. Scasso R, Carey S, Kratzmann DJ, & Naranjo J-A Accretionary lapilli from the 6.7 ka phreatomagmatic eruption of Hudson volcano. IAVCEI Third International Maar Conference Malarge, Argentina.

2007. Kratzmann DJ, Carey S, Scasso R & Naranjo J-A. Holocene processes and petrogenesis at a long-lived trachyandesitic magmatic system. AGU Fall Meeting, poster V41D-0812.

2005. Kratzmann DJ, Carey S, Scasso R, Naranjo J-A & Bande A. Melt Diversity and Magma Mixing During the 1991 Eruptions of Hudson Volcano, Chile. AGU Fall Meeting, poster V41B-1444.

2005. Carey S, Scasso R, Kratzmann DJ, Naranjo J-A & Bande A. 2005. Stratigraphy and Melt Compositions of the 3.6 and 6.7 ka Plinian Eruptions of Hudson Volcano, Chile. AGU Fall Meeting, poster V41B-1443.

2005. Bande A, Carey S, Kratzmann DJ, Naranjo J-A, Ruiz L & Scasso R. 2005. Correlacion entre depositos proximales y distales de la erupcion del 12 al 15 de agosto de 1991 del volcan Hudson: su importancia para refinar la historia eruptiva. Congreso Geologico Argentino, 16, La Plata.

2004. Kratzmann DJ, Cole R, Thomas T & Kammerer M. 2004. Reconnaissance field and geochemical analyses of Turrialba volcano, Costa Rica. Geological Society Australia Annual Meeting, poster.