@proceedings {303, title = {Improving seismic hazard assessment in New England through the use of surficial geologic maps and expert analysis}, volume = {45}, year = {2013}, note = {Accession Number: 2014-021037; Conference Name: Geological Society of America, Northeastern Section, 48th annual meeting; Bretton Woods, NH, United States; Conference Date: 20130318; Language: English; Coden: GAAPBC; Collation: 2; Collation: 50-51; Publication Types: Abstract Only; Serial; Conference document; Updated Code: 201414; Monograph Title: Geological Society of America, Northeastern Section, 48th annual meeting; Monograph Author(s): Anonymous; Reviewed Item: Analytic}, month = {2013/02/01/}, pages = {50 - 51}, publisher = {Geological Society of America (GSA) : Boulder, CO, United States}, address = {United States}, abstract = {In New England, earthquakes pose a risk to the built environment. New England state geological surveys partnered with the Northeast States Emergency Consortium to integrate geologic information and GIS analysis for risk communication. Connecticut, Maine, Massachusetts, and Vermont employed surficial geologic maps, deglaciation history, glacial stratigraphy, and professional judgment to reclassify surficial geologic materials into one of the five National Earthquake Hazard Reduction Program (NEHRP) site classifications (A, B, C, D, and E). These new classifications were used in the HAZards U.S. Multi-Hazard (HAZUS-MH) risk assessment application as a substitute for site class value of "D," used in HAZUS-MH throughout New England as a default value. Coding of surficial geologic materials for the five NEHRP site classifications was then compared with classifications using the Wald methodology, a method using slope analysis as a proxy for shear-wave velocity estimates. Comparisons show that coding to site classes using the Wald methodology underestimates categories A (high-velocity shear-wave materials, least relative hazard) and E (lowest-velocity shear-wave materials, greatest relative hazard) when evaluated side by side with coding done with the aid of surficial geologic maps. Geologic maps provide insights into the location of buried low shear wave velocity materials not afforded by the Wald methodology. North of the glacial limit, derangement of drainage resulted in extensive ponding of meltwaters and the subsequent deposition of thick sequences of lacustrine mud. Inundation by the sea immediately following deglaciation in New England resulted in the deposition of spatially extensive and locally thick sequences of glacial marine mud. Surficial geologic maps better capture these circumstances when compared with the Wald methodology. Without the use of surficial geologic maps, significant areas of New England will be incorrectly classified as being more stable than actual site conditions would allow. By employing surficial geologic information, HAZUS-MH earthquake loss estimates are improved, providing local and regional emergency managers with more accurate information for locating and prioritizing.

}, keywords = {$\#$StaffPubs, earthquakes, Environmental geology, geologic hazards, maps, natural hazards, New England, risk assessment, seismic risk, seismic zoning, surficial geology, surficial geology maps, technology, United States}, isbn = {00167592}, url = {https://gsa.confex.com/gsa/2013NE/webprogram/Paper214837.html}, author = {Becker, Laurence R. and Patriarco, Steven P. and Marvinney, Robert G. and Thomas, Margaret A. and Stephen B Mabee and Fratto, Edward S.} } @article {22, title = {National Geologic Map Database}, publisher = {United States Geological Survey, Association of American State Geologists}, abstract = {

This database houses almost all geologic maps produced by the USGS, and links to almost all maps published by state geologic surveys, including the MGS.

Searching by placename is currenty disabled, but an interactive web-map interface to the NGMDB can be found here:

http://mrdata.usgs.gov/geology/state/map.html?x=-71.8089194224132\&y=42.2562234015901\&z=8


It is also recommended you find the name of the USGS 7.5{\textquoteright} topographic quadrangle your town is in by looking at the DEP Hydrogeologic Information Matrix, and searching the database for that. It is also very useful to search the USGS Publication Warehouse as well for the quadrangle you want.

}, keywords = {$\#$BedrockMaps, $\#$SurficialMaps, bedrock geology, geologic maps, map, surficial geology}, url = {http://ngmdb.usgs.gov} } @Map {324, title = {USGS Surficial Geologic Map Compilations (OFR 2006-1260)}, abstract = {Since 2006, the USGS has been releasing compilations of updated surficial geology compilations for Massachusetts under OFR2006-1260 (http://pubs.usgs.gov/of/2006/1260/). Older, more detailed surficial geologic maps (GQs, etc...) for Massachusetts can be downloaded from the National Geologic Map Database (http://ngmdb.usgs.gov) and the USGS Publications Warehouse (http://pubs.usgs.gov) Compilation areas published under OFR2006-1260 are: See the links below for the USGS websites for each product. If you{\textquoteright}re looking for an older, more detailed surficial geologic map of a particular quadrangle, we recommend using the National Geologic Map Database (http://ngmdb.usgs.gov) and the USGS Publications Warehouse (http://pubs.usgs.gov). We also recommend MassDEP{\textquoteright}s Hydrogeologic Information Matrix for finding the most recent USGS publications for a given town in Massachusetts (http://www.mass.gov/eea/docs/dep/water/compliance/hydromat.pdf}, keywords = {$\#$MGSPub, $\#$SurficialMaps, surficial geology, USGS}, url = {http://pubs.usgs.gov/of/2006/1260} }