FANR 3060 1st Edition Lecture 3 Outline of Last LectureI. Geologic History of the Southeastern USII. Geologic History of GAOutline of Current LectureI. Landscape DevelopmentII. Different types of LandscapesIII. The Piedmont LandscapeChapter 1 con’tI. Figure 1.9 (Landscape development)a. **Rain in GA = 50 inches per yearb. Land plants evolved 500 myac. All water is headed to the oceand. Mountainsi. Lots of runoff from rain accelerated weatheringii. Particles form sedimentary rocke. Flatlandsi. Channels form to oceanf. Everything ends up being “gently rolling” over timeII. Figure 1.10 (Landscape development)These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.a. Valleys & ridges run NE – SWb. Valleys and Ridges are sedimentaryc. When Africa hit N. America, the flat areas became twisted and pushed upi. Resulting in curvature of the soil layers you seeIII. Different Landscapesa. Alluviumi. Eroded, soil – like material laid down on floodplains of major riversii. Fig. 1.11b. Limestonei. Weathers easilyii. Limestone is made out of calciteiii. A limestone landscape is called karstiv. Fig. 1.12c. Cavesi. Only form in limestoneii. CO2 + H2O  H2CO3  H+ + HCO3-1. H+ is acid2. All rain is a little acidic because CO2 gets dissolved into watera. Avg pH = 5.5iii. Weathering Reaction1. CaCO3 + H+  CA2+ + HCO3-d. Beach-fronti. Winds off lake have blown sand into parallel dunes1. Low swampy areas in between2. Swampy areas contain mucka. Muck = peaty soil material formed from plant debris that accumulate in low areas where water table comes right to the surface IV. The Piedmonta. Fig 1.14b. Soil series = types of soili. Each have characteristic soil profiles1. Soil profiles are the horizons from top to bottomii. First Soil series in figure1. No B horizon2. Gray color = very close to water tablea. Pores are filled with waterb. Water tables are seasonalc. Highest in the winter i. Less plants growing, less evaporationiii. Second soil series in picture1. Wilkes series2. Has A,B, and C horizons3. On the slope, so B horiz is shalloweriv. Third soil series in figure1. Lloyd soil series2. 80% of Piedmont looks like this3. B horiz is “GA red clay”4. C horiz is rock structurea. Parent