Sean R. LaHusen Alex R Grant 20240103 spreadsheet https://doi.org/10.5066/P9ATQ0OS Sean R. LaHusen Alex R Grant 20230930 publication Compilation of field data collected in the Oregon Coast Range Tyee Formation. Location, strike and dip, Relative composition and bed thickness of interbedded sandstone and siltstone, Schmidt Hammer stiffness, notes, and sampled landslide density are provided. Landslide density is calculated using the manually mapped landslide deposit polygons from LaHusen et al. (2020). These data were collected to assess the relationship between landslides within the Tyee formation and intra-unit variability of structural and material properties. Point measurements of bedding, siltstone and sandstone composition, and Schmidt hammer stiffness were used to generate spatial interpolations across a small section of the Tyee Formation. These data may be used to support future studies of the Tyee Formation that rely on these measured physical properties. 20230930 publication date Complete None planned -124.2283 -123.1407 44.8731 42.9886 ISO 19115 Topic Category geoscientificInformation USGS Thesaurus geology stratigraphy engineering geology landslides landslide susceptibility assessment USGS Metadata Identifier USGS:650a8ae0d34e823a02733cae Common Geographic Areas Oregon None. Please see 'Distribution Info' for details. Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. Sean R Lahusen U.S. Geological Survey, SOUTHWEST REGION Research Geologist mailing address

350 North Akron Road

Moffett Field CA 94035 US 650-439-2844 slahusen@usgs.gov Data were compiled using Microsoft Excel (version 16) and ArcGIS Pro (v3.1.1) in a Windows 10 Enterprise environment. No formal attribute accuracy tests were conducted. No formal logical accuracy tests were conducted. Data set is considered complete for the information presented, as described in the abstract. Data only cover the Tyee Formation in the Oregon Coast Range and do not extend to adjacent regions of other surficial bedrock. A formal accuracy assessment of the horizontal positional information in the data set has not been conducted. A formal accuracy assessment of the horizontal positional information in the data set has not been conducted. S. R. LaHusen A. R. Duvall A. M. Booth A. Grant B. A. Mishkin D. R. Montgomery W. Struble J. J. Roering J. Wartman 20200916 publication Science Advances vol. 6, issue 38 n/a American Association for the Advancement of Science (AAAS) https://doi.org/10.1126/sciadv.aba6790 Digital and/or Hardcopy 20200916 publication date Deep seated landslides in the Tyee Formation mapped by LaHusen and others (2020) Landslide polygons used to construct areal densities of landsliding. Harold Ernest Vokes Parke Detweiler Snavely Jr. Donald A. Myers 1951 publication n/a US Geological Survey https://doi.org/10.3133/om110 Digital and/or Hardcopy 1951 publication date Vokes1951 (geologic map) Bedding strike/dip data used to supplement our own measurements for a more complete dataset for bedding attitude interpolation E.M. Baldwin 1955 publication n/a US Geological Survey https://doi.org/10.3133/om162 Digital and/or Hardcopy 1955 publication date Baldwin1955 (geologic map) Bedding strike/dip data used to supplement our own measurements for a more complete dataset for bedding attitude interpolation E.M. Baldwin 1961 publication n/a US Geological Survey https://doi.org/10.3133/om204 Digital and/or Hardcopy 1961 publication date Baldwin1961 (geologic map) Bedding strike/dip data used to supplement our own measurements for a more complete dataset for bedding attitude interpolation P. D. Snavely Jr. N. S. MacLeod H. C. Wagner W. W. Rau 1976 publication n/a US Geological Survey https://doi.org/10.3133/i867 Digital and/or Hardcopy 1972 publication date Snavely1972 (geologic map) Bedding strike/dip data used to supplement our own measurements for a more complete dataset for bedding attitude interpolation Landslide density calculation: Landslide density was calculated as the proportion of area underlain by deep-seated landslide deposits within a 5km-radius circular moving window using focal statistics tool in ArcPro v3. Manually mapped landslides from LaHusen et al. (2020) were used for density calculation. 20220913 Field Data Collection: Lithologic and structural data was collected at exposed bedrock outcrops, including roadcuts. Bedding thickness and relative proportion of sandstone:siltstone was measured in at each outcrop. Stiffness data was collected on sandstone beds using a mean from 10 sample hits using a Schmidt Type-N rebound hammer. Bedding strike and dip was measured using a Brunton compass. 20200713 Raster Grid Cell 20858 8902 1 Universal Transverse Mercator 10 0.9996 -123.0 0.0 500000.0 0.0 row and column 10.0 10.0 meters WGS_1984 WGS 84 6378137.0 298.257223563 Tyee_FieldObservations.csv Comma Separated Value (CSV) file containing data. Producer Defined site_name Field site name Producer Defined Unique site names for each point measurement. area Location within one of three study areas: training areas A and B or testing area Producer Defined Training Area B Northwest segment of the Tyee Formation studied in companion publication of LaHusen and Grant (2023) Producer defined Training Area A Central segment of the Tyee Formation studied in companion publication of LaHusen and Grant (2023) Producer defined Testing South central segment of the Tyee Formation studied in companion publication of LaHusen and Grant (2023) Producer defined lat Latitude (degrees north) Producer Defined 43.66025921 44.6696381 degrees lon Longitude (degrees west) Producer Defined -124.1035218 -123.2368788 degrees strike Measured or estimated bedding strike Producer Defined 0 360 degrees dip Measured or estimated bedding dip Producer Defined 0 18 degrees dip_ks Dip magnitude from Simple Kriging interpolation using 971 total bedding attitude points combined from this study and existing geologic maps (Vokes et al, 1951; Baldwin, 1955; Baldwin, 1961; Snavely et al, 1972) Producer Defined 3.01880002 17.80039978 degrees silt_perc Percent of the the exposed stratigraphic section composed of siltstone Producer Defined 1.0 55.0 percent silt_thick Maximum measured thickness of siltstone beds in exposed section Producer Defined 0 500 centimeters sand_thick Maximum measured thickness of sandstone beds in exposed section Producer Defined 100 800 centimeters R_value Measured R-value of sandstone beds in section, averaged from 10 strikes with Schmidt Hammer Producer Defined 11.5 56.0 - R_STD Standard deviation of 10 Schmidt Hammer Strikes on sandstone beds Producer Defined 1.200000048 9.199999809 - notes Other observations Producer Defined Where appropriate, comments and other notes on the measured outcrop LS_dens_all Measured areal density of all mapped deep-seated landslide deposits from Lahusen et al. (2020) using 5km radius moving window Producer Defined 0.20194801 12.63359934 LS_dens_diponly Measured areal density of dipslope-oriented (rake < 45°) landslide deposits from Lahusen et al. (2020) using 5km radius moving window Producer Defined Not Measured data point outside of valid interpolation range for landslide density Producer defined 0.16 8.37 LS_dens_notdip Measured areal density of non-dipslope-oriented (rake > 45°) landslide deposits from Lahusen et al. (2020) using 5km radius moving window Producer Defined Not Measured data point outside of valid interpolation range for landslide density Producer defined 0.07 7.71 Rasters.zip Areal density of deep-seated landslides in a moving 5m radius. Data are provided for all landslides (adens5k.tif), cataclinal landslides (catdens5km.tif), and non-cataclinal landslides (noncatdens5km.tif) Producer Defined Value Areal density of deep-seated bedrock landslide deposits calculated using a 5km-radius moving window Producer Defined 0.0 1.0 GS ScienceBase U.S. Geological Survey mailing address

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Digital Data https://doi.org/10.5066/P9ATQ0OS None 20240103 Alex R Grant U.S. Geological Survey, SOUTHWEST REGION Research Civil Engineer mailing address

University of Washington

Seattle WA 98195 United States 206-685-7563 agrant@usgs.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998