Welcome all to the 2019 Friends of the Pleistocene: Central Walker Lane trip!
The 2019 meeting will take place from Thursday 10/3 through Sunday 10/6. So far, myself (Ian Pierce), Ken Adams, Jayne Bormann, Rachel Hatch, Chad Carlson, Craig DePolo, Bill Hammond, and Russell Shapiro have agreed to present. If you have any work in the area you would like to present, please let us know and we will include you!
Please use the registration form below to register for the 2019 Pacific Cell Friends of the Pleistocene field conference. The trip costs money (e.g. porta potties, adult refreshments, etc.), plus you get a t-shirt! Support the trip by registering soon. The deadline for registering is 9/20. However, don’t be afraid to show up without registering, you are a friend of the Pleistocene after all and everyone likes when their friends show up to the party (not that this is a party, nor that there is anything wrong with that).
Whew summer is flying by fast! Some updates – we’ve done a pre-run of the trip, and have most stops figured out. For a brief overview- if you attend this trip you will see lidar data, cosmogenic ages, soils, alluvial fans, faults of all varieties, lacustrine features, volcanoes, and glacial moraines- hopefully enough to satiate your thirst for FOP. The main focus of the trip will be looking at the evidence we have found in the Central Walker Lane that helps to explain how the 7-8 mm/yr of northwest directed dextral shear observed by GPS stations is accommodated across a region despite a general lack of northwest-oriented strike-slip faults. Here we will visit locations where we do (and don’t) see evidence of dextral shear to try to understand how shear is accommodated through this part of the Walker Lane.
Vehicles: ~100 miles of the total travel including the campsites will be on graded dirt roads. These roads should be OK in a passenger car that has some clearance, but low clearance compact cars might have trouble in a few places. You are definitely increasing your chances of getting flats if you are in a car for some of these roads.
Thursday night (10/3) we will be dry camping in eastern Carson Valley off of Eldon Road. This area is super dry, plan for no campfires.
Friday morning (10/4) we will break camp and have an overview of the trip from a hill looking out over Carson Valley above the campsite, as well as discuss the Eastern Carson Valley fault zone (Craig DePolo) and the local geodetic network (Jayne Bormann). From there we travel to Smith Valley where we will look at a slip rate site on the Artesia Fan, and discuss how the rangefront geometry accommodates strike-slip motion. Then onward to Mason Valley where we will stop for lunch with a brief overview of what we know about left-lateral faulting in the Central Walker Lane and the rangefront there. Then down to the Pine Grove Hills (~40 miles of dirt travel) where we will look at an active strike-slip fault. Finally we will reach our campsite at Fletcher Springs near the epicentral area of the 2016 Nine Mile Ranch earthquake sequence in Fletcher Valley. We will camp here Friday & Saturday nights. This site does not have water, but we will have toilets. Hopefully we will be able to have a campfire, but state fire restrictions may not be cooperative.
Saturday morning (10/5) we will wake up and travel east towards the Walker Lake basin over Lucky Boy Pass (graded dirt road, ~20 miles). First we will stop and look at lava flows that Marith Reheis will convince you influenced the outflow direction of Lake Russel in the mid-Pleistocene. Rachel Hatch will describe her results from relocating the 9-mile ranch earthquake sequence. Then on to Walker Lake where, over the course of multiple stops, we will look at evidence of strike-slip faulting, normal faulting, offshore seismic data, Pleistocene, Holocene, and Historic shoreline features, tufa, and discuss some issues with dating and measuring lateral offsets. Presenters here include: Ken Adams, Annie Kell, Noah Abramson, Marith Reheis, and Russel Shapiro. When we return to camp we will have the regularly scheduled Saturday night business meeting.
Sunday morning (10/6), we will wake up and travel west to Bridgeport, where we will discuss some of Bill Hammond’s recent work on climate-influenced seismic and geodetic patterns, Chad Carlson’s paleomagnetic work in the area, a hi-res gravity model of the basin, and look at some fault scarps and glacial moraines in the basin.
If anyone has anything they would like to present, especially in/near Bridgeport, please get in touch.
The road log, guidebook, and a suite of lidar KMZs will be available in September.
Center for Neotectonic Studies/Nevada Seismological Lab
University of Nevada, Reno
ian @ nevada.unr.edu