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Welcome to the blog for the Oberlin College Geomorphology Research Group. We are a diverse team of students working with Amanda Henck Schmidt on geomorphology questions. This blog is an archive of our thoughts about our research, field work travel notes, and student research projects. Amanda's home page is here.

Monday, February 16, 2015

Soil Pits Winter Term 2015



Soil Pits Site Descriptions & Analyses

CH-014 (Basin 35)


 


  •   CH-014 was collected from a riverbank. The O/A horizon is an organic-rich silt loam about 15cm deep. The B1 horizon (15-35cm) is very clayey, possesses a weak structure, and is between 30-40% gravel. The B2 horizon is 50-60% gravel. The flatland approaching the bank appears to be a grassy field with a few scattered small trees. The field slopes sharply towards the bank. The levels of 137Cs and 210Pbex exhibit fairly typical exponential-type decay with depth. The amount of 210Pbex decreases more quickly than the amount of 137Cs.


CH-015 (Basin 35)
   

  • The soil comprising CH-015 is a uniform, coffee-brown color throughout the column. The O/A horizon is a dark clay loam that is high in organics and is about 35cm thick. The B horizon is gravelly silt clay with 40-50% gravel and weak structure. This soil pit is located in a farm field. The amount of 137Cs and 210Pbex both increase between the 0-5cm section and the 5-10cm section, and drop off dramatically with increased depth. This pattern suggests that this area has experienced a change in erosion rates.



CH-028 (Basin 35)