U.S. Department of the Interior National Park Service Natural Resource Stewardship and Science Directorate Geologic Resources Division Allegheny Portage Railroad National Historic Site and Johnstown Flood National Memorial GRI Ancillary Map Information Document Produced to accompany the Geologic Resources Inventory (GRI) Digital Geologic-GIS Data for Allegheny Portage Railroad National Historic Site and Johnstown Flood National Memorial alpo_jofl_geology.pdf Version: 5/11/2020 I Allegheny Portage Railroad National Historic Site and Johnstown Flood National Memorial Geologic Resources Inventory Map Document for Allegheny Portage Railroad National Historic Site and Johnstown Flood National Memorial Table of Contents Geologic Resourc..e..s.. .I.n..v..e..n..t.o...r.y.. .M...a..p.. .D...o..c..u..m...e...n..t............................................................................ 1 About the NPS Ge..o..l.o..g..i.c... .R..e..s..o..u...r.c..e..s.. .I.n..v..e..n...t.o..r.y.. .P...r.o..g...r.a..m............................................................... 3 GRI Digital Maps a..n...d.. .S..o..u...r.c..e.. .M...a..p.. .C...i.t.a..t.i.o...n..s.................................................................................. 5 Index Map .................................................................................................................................................................... 6 Digital Bedrock Geologic-GIS Map of Allegheny Portage Railroad National Historic Site, John..s..t..o..w...n.. .F..l.o..o...d.. .N...a..t.i.o..n..a..l. .M...e..m...o...r.i.a..l. .a..n..d... .V..i.c..i.n..i.t.y.................................................. 7 Map Unit Lis.t................................................................................................................................................................... 7 Map Unit De.s..c..r.i.p..t.io..n..s...................................................................................................................................................... 8 PNcc - Cas.s..e..l.m...a..n.. .F..o..r.m...a..t.i.o..n.. .(.P...e..n..n..s..y.l.v..a..n..i.a..n..)..................................................................................................... 8 PNcg - Gle.n..s..h..a..w.. .F..o..r.m...a..t.i.o..n.. .(.P...e..n..n..s..y.l.v..a..n..i.a..n..)....................................................................................................... 8 PNa - Alleg.h..e..n..y.. .G...r.o..u..p.. .(.P...e..n..n..s.y..l.v..a..n..i.a..n..)............................................................................................................... 8 PNp - Potts..v.i.l.l.e.. .G...r.o..u..p.. .(.P..e..n..n..s..y..l.v..a..n..ia..n..)................................................................................................................. 8 Mmc - Mau.c..h.. .C...h..u..n..k. .F...o..r.m...a..t.i.o..n.. .(.M...i.s.s..i.s..s..ip..p..i.a..n..).................................................................................................... 8 Mb - Burgo.o..n.. .S..a..n..d..s..t.o..n..e.. .(.M...i.s..s..i.s.s..i.p..p..i.a..n..).............................................................................................................. 8 Mp - Pocon..o.. .F..o..r.m...a..t.i.o..n.. .(.M...i.s..s.i.s..s..i.p..p..ia..n..)................................................................................................................. 9 MDso - She..n..a..n..g..o.. .F..o..r.m...a..t.i.o..n.. .t.h..r.o..u..g..h.. .O...s..w...a..y.o.. .F...o..r.m...a..t.i.o..n..,. .u..n..d..iv..i.d..e..d.. .(.M...i.s..s..is..s..i.p..p..i.a..n.. .a..n..d.. .D..e..v..o..n..i.a..n..)................... 9 MDr - Rock.w...e..l.l .F...o..r.m...a..t.i.o..n.. .(.M...i.s.s..i.s..s..i.p..p..ia..n.. .a..n..d.. .D...e..v..o..n..i.a..n..)..................................................................................... 9 Dck - Catsk..i.ll. .F..o..r..m...a..t.io..n.. .(..D..e..v..o..n..i.a..n..)...................................................................................................................... 9 Df - Forekn.o..b..s.. .F..o..r.m...a..t.i.o..n.. .(.D...e..v..o..n..ia..n..).................................................................................................................... 9 Ds - Scherr. .F..o..r..m...a..t.io..n.. .(..D..e..v..o..n..i.a..n..)......................................................................................................................... 9 Dbh - Braill.e..r. .a..n..d.. .H...a..r.r.e..l.l. .F..o..r.m...a..t.i.o..n..s..,. .u..n..d..i.v.i.d..e..d.. .(.D...e..v..o..n..i.a..n..)................................................................................ 9 Dh - Hamilt.o..n.. .G...r.o..u..p.. .(.D...e..v..o..n..ia..n..)............................................................................................................................ 9 Doo - Ono..n..d..a..g..a.. .a..n..d.. .O..l.d.. .P...o..r.t. .F..o..r.m...a..t.i.o..n..s..,. .u..n..d..i.v.i.d..e..d.. .(.D...e..v..o..n..i.a..n..)...................................................................... 10 DSkt - Ke.y.s..e..r. .a..n..d.. .T..o..n..o..l.o..w...a..y.. .F..o..r.m...a..t.i.o..n..s..,. .u..n..d..iv..i.d..e..d.. .(.D...e..v..o..n..ia..n.. .a..n..d.. .S...i.lu..r..ia..n..)................................................... 10 Swm - Wil.l.s.. .C...r.e..e..k.. .F..o..r.m...a..t.i.o..n.. .t.h..r.o..u..g..h.. .M...i.f.f.l.in..t.o..w...n.. .F..o..r.m...a..t.i.o..n..,. .u..n..d..i.v..i.d..e..d.. .(.S..i.l.u..r.i.a..n..)............................................. 10 Swc - Will.s.. .C..r..e..e..k. .F...o..r.m...a..t.i.o..n.. .(.S..i.l.u..r.i.a..n..)................................................................................................................ 10 Sbm - Blo.o..m...s..b..u..r.g.. .a..n..d.. .M...i.f.f.l.in..t.o..w...n.. .F..o..r.m...a..t.i.o..n..s..,. .u..n..d..i.v..id..e..d.. .(..S..i.l.u..r.i.a..n..).................................................................. 10 Sc - Clinto..n.. .G...r.o..u..p.. .(.S..i.l.u..r.i.a..n..)................................................................................................................................ 11 St - Tusca..r.o..r.a.. .F..o..r.m...a..t.i.o..n.. .(.S...il.u..r.i.a..n..)...................................................................................................................... 11 Oj - Junia.t.a.. .F..o..r.m...a..t.i.o..n.. .(.O...r.d..o..v..ic..i.a..n..)..................................................................................................................... 11 Obe - Bald.. .E...a..g..l.e.. .F..o..r.m...a..t.i.o..n.. .(.O...r.d..o..v..ic..i.a..n..)............................................................................................................ 11 Or - Reed.s..v.i.l.l.e.. .F..o..r.m...a..t.i.o..n.. .(.O...r.d..o..v..i.c..i.a..n..)............................................................................................................... 11 Ocl - Cobu..r.n.. .F...o..r.m...a..t.i.o..n.. .t.h..r.o..u..g..h.. .L..o..y..s.b..u..r..g.. .F..o..r.m...a..t.i.o..n..,. .u..n..d..i.v.i.d..e..d.. .(.O...r.d..o..v..i.c..i.a..n..)................................................... 11 Oba - Bell.e..f.o..n..t.e.. .a..n..d.. .A...x.e..m...a..n..n.. .F..o..r..m...a..t.io..n..s..,. .u..n..d..i.v..i.d..e..d.. .(.O...r.d..o..v..i.c.i.a..n..)................................................................... 12 Ons - Nitta..n..y.. .a..n..d.. .S..t.o..n..e..h..e..n..g..e../.L..a..r..k.e.. .F...o..r.m...a..t.i.o..n..s.,. .u..n..d..i.v..i.d..e..d.. .(.O...r.d..o..v..i.c.i.a..n..).......................................................... 12 Cg - Gate.s.b..u..r..g.. .F..o..r.m...a..t.i.o..n.. .(.C...a..m...b..r.i.a..n..)................................................................................................................ 13 Cw - Warr.i.o..r. .F..o..r..m...a..t.io..n.. .(..C..a..m...b..r.i.a..n..)..................................................................................................................... 13 Cph - Plea..s..a..n..t. .H...il.l. .F..o..r.m...a..t.i.o..n.. .(.C...a..m...b..r.i.a..n..)........................................................................................................... 13 Cwb - Wa.y..n..e..s.b..o..r..o.. .F..o..r.m...a..t.i.o..n.. .(.C...a..m...b..r.i.a..n..).......................................................................................................... 13 Digital Geologic-GIS Map of Johnstown Flood National Memorial and portions of Allegheny Portag..e.. .R...a..i.l.r.o...a..d.. .N...a..t.i.o..n..a..l. .H...i.s..t.o..r..i.c.. .S..i.t.e...................................................................... 14 Map Unit Li.s..t................................................................................................................................................................. 14 Map Unit D.e..s..c..r.i.p..t.io..n..s.................................................................................................................................................... 14 2020 NPS Geologic Resources Inventory Program II Qal - Alluv..i.u..m... .(.Q...u..a..t.e..r.n..a..r.y..)................................................................................................................................. 14 PNcc - Ca..s.s..e..l.m...a..n.. .F..o..r.m...a..t.i.o..n.. .(.P...e..n..n..s..y.l.v..a..n..i.a..n..)................................................................................................... 15 PNcg - Gl.e..n..s..h..a..w.. .F..o..r.m...a..t.i.o..n.. .(.P...e..n..n..s..y.l.v..a..n..i.a..n..)....................................................................................................