U.S. Department of the Interior National Park Service Natural Resource Stewardship and Science Directorate Geologic Resources Division Klondike Gold Rush National Historical Park GRI Ancillary Map Information Document Produced to accompany the Geologic Resources Inventory (GRI) Digital Geologic Data for Klondike Gold Rush National Historical Park klgo_geology.pdf Version: 7/9/2021 I Klondike Gold Rush National Historical Park Geologic Resources Inventory Map Document for Klondike Gold Rush National Historical Park Table of Contents Geologic R.e..s.o..u..r.c..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 N..P..S.. .G...e..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 .M...a..p.. .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 Map Unit Li.s..t.......................................................................................................................... 7 Map Unit De..s..c..r.i.p..t.i.o..n..s............................................................................................................. 8 g - Glaciers.. .(..H..o..l.o..c..e..n..e..)................................................................................................................................................ 8 Qs - Uncon..s..o..l.id..a..t.e..d.. .s..u..r..f.i.c..ia..l. .d..e..p..o..s..i.t.s..,. .u..n..d..iv..i.d..e..d.. .(.Q...u..a..t.e..r.n..a..r..y..)................................................................................. 8 Qa - Alluviu..m... .(.Q...u..a..t.e..r.n..a..r..y..).......................................................................................................................................... 8 Qaf - Alluv.i.a..l .f..a..n.. .a..n..d.. .t.a..lu..s.. .d..e..p..o..s..i.t.s.. .(.Q...u..a..t.e..r.n..a..r..y..)...................................................................................................... 8 Qc - Colluv.i.u..m... .(.Q...u..a..t.e..r.n..a..r.y..)......................................................................................................................................... 9 Qrg - Rock. .g..l.a..c..ie..r.. .d..e..p..o..s..it.s.. .(..Q..u..a..t.e..r..n..a..r.y..).................................................................................................................... 9 Qhg - Neog..l.a..c..ia..l. .d..r.i.f.t. .(..Q..u..a..t.e..r..n..a..r.y..).............................................................................................................................. 9 Tmi - Youn.g..e..r. .g..r..a..n..it.i.c.. .r.o..c..k..s.. .(.T..e..r..t.ia..r..y..,. .M..i.o..c..e..n..e.. .t.o.. .P..l.io..c..e..n..e..)....................................................................................... 9 Tod - Gra.n..o..d..i.o..r.i.t.e..,. .q..u..a..r.t.z.. .d..i.o..r.i.t.e..,. .a..n..d.. .d..io..r..it.e.. .(..T..e..r.t.i.a..r.y..,. .O...li.g..o..c..e..n..e.. .a..n..d.. .l.a..t.e.. .E..o..c..e..n..e..)................................................ 10 Tcp - You..n..g..e..r. .p..h..a..s..e..,. .C..o..a..s..t. .p..l.u..t.o..n..i.c.. .c..o..m..p..l.e..x.. .o..f. .B...r.e..w... .a..n..d.. .M...o..r.r..e..ll. .(.1..9..7..9..b..).. .(.T..e..r.t.i.a..r.y..,. .E..o..c..e..n..e..).............................. 10 Tcpp - Porphyritic granodiorite phase of Coast plutonic complex of Brew and Morrell (1979b) (Tertiary, .E..o..c..e..n..e..)....................................................................................................................................................... 11 TKg - Fels..i.c.. .g..r.a..n..i.t.ic.. .r..o..c..k.s.. .(..T..e..r.t.i.a..r.y..,. .P..a..l.e..o..c..e..n..e..,. .o..r. .L..a..t.e.. .C..r..e..t.a..c..e..o..u..s..,. .M..a..a..s..t.r..ic..h..t.i.a..n..)............................................... 12 TKts - Foliated tonalite sill of Coast plutonic complex of Brew and Morrell (1979b) (Tertiary, Paleocene..,. .a..n..d.. .l.a..t.e..s..t. .C..r..e..t.a..c..e..o..u..s..)............................................................................................................................ 13 Kmgr - Gr.a..n..i.t.i.c.. .r.o..c..k..s.. .o..f. .c..e..n..t.r.a..l. .a..n..d.. .s..o..u..t.h..e..a..s..t. .A...la..s..k..a.. .(.C...r.e..t.a..c..e..o..u..s..,. .A...lb..i.a..n.. .t.o.. .C..o..n..i.a..c..i.a..n..)...................................... 14 Kmqm - Q.u..a..r..t.z.. .m..o..n..z..o..n..i.t.e..,. .m...o..n..z..o..n..it.e..,. .a..n..d.. .s..y..e..n..i.t.e.. .(.C...r.e..t.a..c..e..o..u..s..,. .A...lb..i.a..n.. .t.o.. .C..o..n..i.a..c..i.a..n..)............................................ 16 Keg - Gra.n..o..d..i.o..r.i.t.e.. .a..n..d.. .o..t.h..e..r. .p..l.u..t.o..n..i.c.. .r.o..c..k..s.. .(.E..a..r.l.y.. .C..r..e..t.a..c..e..o..u..s..,. .H..a..u..t.e..r.i.v..i.a..n.. .t.o.. .A..p..t.i.a..n..)............................................ 16 Kgb - Gab..b..r.o.. .a..n..d.. .d..i.o..r.i.t.e.. .o..f. .s..o..u..t.h..e..a..s..t. .A...l.a..s..k.a.. .(..C..r.e..t.a..c..e..o..u..s..)..................................................................................... 17 Kum - Ultr.a..m...a..f.i.c.. .r.o..c..k..s.. .o..f. .s..o..u..t.h..e..a..s..t. .A...l.a..s..k.a.. .(..E..a..r.l.y.. .C..r.e..t.a..c..e..o..u..s..)............................................................................... 18 TRb - Maf.i.c.. .v..o..l.c..a..n..ic.. .r..o..c..k.s.. .o..f.. .C..h..i.lk..a..t. .P..e..n..i.n..s..u..la.. .(..L..a..t.e.. .T..r.i.a..s..s..ic..)................................................................................. 18 PZgn - Ro..o..f. .p..e..n..d..a..n..t.s.. .o..f. .t.h..e.. .C...o..a..s..t. .p..lu..t.o..n..i.c.. .c..o..m...p..le..x.. .o..f.. .B..r.e..w.... .a..n..d.. .M..o..r..r.e..l.l .(..1..9..7..9..b..). .(.P..a..l.e..o..z..o..i.c..).............................. 19 GRI Ancill.a..r.y.. .S..o..u..r.c..e.. .M...a..p.. .I.n..f.o..r.m...a..t.i.o..n.................................................................................. 21 USGS So.u..r.c..e.. .M...a..p.. .R..e..f.e..r..e..n..c..e..s.................................................................................................................................. 21 Geologic .M..a..p.. .o..f.. .A..l.a..s..k..a.............................................................................................................................................. 23 Pamphle.t............................................................................................................................................................ 23 Data ............................................................................................................................................................. 23 Alaska Re..s..o..u..r.c..e.. .D...a..t.a.. .F..il.e..s........................................................................................................................................ 23 ARDF, 1.'. .x.. .3..' .S...k.a..g..w....a..y.. .Q..u..a..d..r..a..n..g..le................................................................................................................... 24 Report ......................................................................................................................................... 24 Data ......................................................................................................................................... 24 Index Map ......................................................................................................................................... 24 Mineral Occurren.c..e.. .M...a..p.............................................................................................................................. 25 References ......................................................................................................................................... 25 GRI Digita.l. .D..a..t.a.. .C..r..e..d..i.t.s........................................................................................................ 40 2021 NPS Geologic Resources Inventory Program KLGO GRI Map Document 1 Geologic Resources Inventory Map Document Klondike Gold Rush National Historical Park, Alaska Document to Accompany Digital Geologic-GIS Data klgo_geology.pdf Version: 7/9/2021 This document has been developed to accompany the digital geologic-GIS data developed by the Geologic Resources Inventory (GRI) program for Klondike Gold Rush National Historical Park, Alaska (KLGO). Attempts have been made to reproduce all aspects of the original source products, including the geologic units and their descriptions, geologic cross sections, the geologic report, references and all other pertinent images and information contained in the original publication. This document contains the following information: 1) About the NPS Geologic Resources Inventory Program – A brief summary of the Geologic Resources Inventory (GRI) Program and its products. Included are web links to the GRI GIS data model, and to the GRI products page where digital geologic-GIS datasets, scoping reports and geology reports are available for download. In addition, web links to the NPS Data Store and GRI program home page, as well as contact information for