National Park Service U.S. Department of the Interior Natural Resource Program Center Minute Man National Historical Park Ancillary Map Information Document Produced to accompany the Geologic Resources Inventory Digital Geologic Data for Minute Man National Historical Park mima_geology.pdf Version: 4/16/2020 I Minute Man National Historical Park Geologic Resources Inventory Map Document for Minute Man National Historical Park Table of Contents Geologic Reso..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 NPS.. .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 Ma..p..s.. .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 Bedroc..k.. .G..e..o...l.o..g..i.c..-.G...I.S... .M...a..p.. .o..f. .M...i.n...u..t.e.. .M...a..n.. .N...a..t.i.o..n...a..l. .H..i.s..t.o...r.i.c.. .S..i.t..e.. ................................ 7 Map Unit Li.s..t. .................................................................................................................................................................. 7 Map Unit D.e..s..c..r.i.p..t.io..n..s.. .................................................................................................................................................... 9 MZd - .D...i.a..b..a..s..e.. .(.M...e..s..o..z..o..ic..)..................................................................................................................................... 9 Dihh -. .I.n..d..i.a..n.. .H..e..a..d.. .H...i.ll. .I.g..n..e..o..u..s.. .C...o..m...p..le..x.. .(.M...i.s..s..i.s.s..i.p..p..i.a..n.. .a..n..d.. .D..e..v..o..n..i.a..n..).............................................................. 9 UNKh.h..g.. .-. .H..u..b..b..a..r..d.. .H..i.l.l. .G..a..b..b..r..o.. .(.a..g..e.. .u..n..k..n..o..w..n..)..................................................................................................... 9 Dcrs -. .C..a..m...b..r.i.d..g..e.. .R...e..s..e..r.v..o..i.r. .S..u..i.t.e.. .(.D...e..v..o..n..ia..n..)....................................................................................................... 9 DSph..g..d.. .-. .P...r.o..s..p..e..c..t. .H..i.l.l. .G..a..b..b..r..o..-.D..i.o..r.i.t.e.. .(.D...e..v..o..n..i.a..n.. .t.o.. .S..i.l.u..r.i.a..n..?..).......................................................................... 10 PZwg..r. .-.. .W...a..l.t.h..a..m... .G...r.a..n..i.t.e.. .(.M...i.d..-.P..a..l.e..o..z..o..i.c.?..)......................................................................................................... 10 DSw.d.. .-. .W...h..i.t.e.. .P..o..n..d.. .G...a..b..b..r.o.. .(..D..e..v..o..n..i.a..n..?.. .t.o.. .S..i.l.u..r.i.a..n..?..)......................................................................................... 10 DSag.. .-. .A...n..d..o..v..e..r. .G..r..a..n..it.e.. .(..D..e..v..o..n..i.a..n.. .t.o.. .S..i.l.u..r.i.a..n..?..)................................................................................................. 10 DSap.. .-. .P...e..g..m...a..t.i.t.e.. .(.D..e..v..o..n..i.a..n.. .t.o.. .S..i.l.u..r.i.a..n..?..)........................................................................................................... 10 DSaq..d.. .-. .A...s..s.a..b..e..t. .Q...u..a..r.t.z.. .D...i.o..r.i.t.e.. .(.D..e..v..o..n..i.a..n.. .t.o.. .S..i.l.u..r.i.a..n..?..)..................................................................................... 10 DOsi.c.. .-. .S...u..d..b..u..r.y. .V...a..l.le..y.. .I.g..n..e..o..u..s.. .C...o..m...p..le..x.. .(.D...e..v..o..n..i.a..n.. .t.o.. .O..r..d..o..v.i.c..i.a..n..?..)................................................................ 11 DZwg..h.. .-.. .W...e..s..t.o..n.. .G...r.o..u..p..,. .H..o..r..n..b..le..n..d..e.. .M...e..m...b..e..r.. .(.N..e..o..p..r..o..t.e..r.o..z..o..ic.. .t.o.. .D...e..v..o..n..ia..n..)..................................................... 11 DZwghb - Weston Group, Hornblende-Biotite Member (Neoproterozoic to Devo..n..ia..n..)............................................................................................................................................................. 11 DZwgp - Weston Group, Plagioclase-Hornblende-Biotite Member (Neo.p..r.o..t.e..r.o..z..o..i.c.. .t.o.. .D..e..v..o..n..i.a..n..).............................................................................................................................. 11 DZwg..m... .-.. .W...e..s..t.o..n.. .G...r.o..u..p..,. .M...y..lo..n..i.t.i.z..e..d.. .M...e..m...b..e..r. .(.N...e..o..p..r.o..t.e..r.o..z..o..i.c.. .t.o.. .D..e..v..o..n..i.a..n..).................................................... 11 Sls - .L..e..x..i.n..g..t.o..n.. .S..u..i.t.e.. .(.S...i.lu..r..ia..n..)............................................................................................................................. 12 Sgr -. .S..u..d..b..u..r.y.. .G...r.a..n..i.t.e.. .(.S...il.u..r.i.a..n..?..)......................................................................................................................... 12 Sgrd - Sudbury. .G...r.a..n..i.t.e..,. .D...a..r.k.. .P..h..a..s..e.. .(.S..i.l.u..r.i.a..n..?..)............................................................................................ 12 Sgrm - Sudbury.. .G...r.a..n..i.t.e..,. .M...i.x..e..d.. .P..h..a..s..e.. .(.S..i.l.u..r.i.a..n..?..)......................................................................................... 12 SZfh.g.. .-. .F..i.s..k..e.. .H..i.l.l. .G..r..a..n..it.e.. .(..N..e..o..p..r.o..t.e..r.o..z..o..i.c.. .t.o.. .S..i.l.u..r.i.a..n..)........................................................................................ 12 bd - B...a..s..ic.. .d..i.k..e.. .(.a..g..e.. .u..n..k..n..o..w..n..)............................................................................................................................. 12 Odgd.. .-. .D...r.a..p..e..r. .G...a..b..b..r.o..-.D...i.o..r.i.t.e.. .(.O...r.d..o..v..ic..i.a..n..?..)....................................................................................................... 12 OCnu.. .-.. .N..a..s..h..o..b..a.. .F..o..r.m...a..t.i.o..n..,. .u..n..d..i.f.f.e..r.e..n..t.i.a..t.e..d.. .(.C...a..m...b..r.i.a..n.. .t.o.. .O...r.d..o..v..ic..i.a..n..)............................................................. 13 OCnbh - Nashoba Formation, Balls Hill Gneiss (Cambrian to Ordovician) ............................................................................................................................................... 13 OCna - Nashob..a.. .F..o..r.m...a..t.i.o..n..,. .a..m...p..h..i.b..o..l.i.t.e.. .(.C..a..m...b..r..ia..n.. .t.o.. .O...r.d..o..v..i.c..i.a..n..)............................................................. 13 OCns - Nashob..a.. .F..o..r.m...a..t.i.o..n..,. .s..c..h..is..t. .(.C...a..m...b..r.i.a..n.. .t.o.. .O...r.d..o..v..i.c.i.a..n..)....................................................................... 14 OCnp - Nashob..a.. .F..o..r.m...a..t.i.o..n..,. .p..e..g..m...a..t.i.t.e.. .(.C...a..m...b..r.i.a..n.. .t.o.. .O...r.d..o..v..ic..i.a..n..)................................................................ 14 OCm. .-.. .M...a..r.l.b..o..r.o.. .F..o..r.m...a..t.i.o..n.. .(.C...a..m...b..r.i.a..n.. .t.o.. .O...r.d..o..v..ic..i.a..n.. .o..r. .O...l.d..e..r.?..)......................................................................... 14 OCmjs - Marlboro Formation, Jupiter Ridge Schist Member (Cambrian to Ordovician o.r. .O...l.d..e..r.?..)................................................................................................................................. 14 Zwm. .-. .W...e..s..t.b..o..r.o.. .F...o..r.m...a..t.i.o..n..,. .M...y.l.o..n..i.t.e.. .(.N...e..o..p..r.o..t.e..r.o..z..o..i.c..?..).................................................................................... 14 UNK.k..g..u.. .-. .K..e..n..d..a..l.l. .G...r.e..e..n.. .U..l.t.r.a..m...y..l.o..n..i.t.e.. .(.a..g..e.. .u..n..k..n..o..w..n..)....................................................................................... 15 UNK.c..h..m... .-. .C..r.a..n..b..e..r..r.y.. .H..i.l.l. .M...y.l.o..n..i.t.e.. .(.a..g..e.. .u..n..k..n..o..w...n..).............................................................................................. 15 Zhm .-. .H...a..y..w..o..o..d.. .B...r.o..o..k.. .M...y..lo..n..i.t.e.. .(.N...e..o..p..r.o..t.e..r.o..z..o..i.c..?..)............................................................................................. 15 Zv - M...a..f.i.c.. .t.o.. .F..e..l.s..i.c. .T...e..c.t.o..n..i.t.e.. .(.N...e..o..p..r.o..t.e..r.o..z..o..i.c..)................................................................................................... 15 Bedr.o..c..k. .o..u..t.c..r.o..p..s.. .a..n..d.. .a..r.e..a..s.. .o..f. .a..b..u..n..d..a..n..t. .o..u..t.c..r.o..p.. .o..r. .s..h..a..l.l.o..w.. .b..e..d..r..o..c.k................................................................. 15 Ancillary S..o..u..r.c..e.. .M...a..p.. .I.n..f.o..r.m...a..t.i.o..n.. ................................................................................................................................ 16 2020 NPS Geologic