U.S. Department of the Interior National Park Service Natural Resource Stewardship and Science Directorate Geologic Resources Division Colonial National Historical Park GRI Ancillary Map Information Document Produced to accompany the Geologic Resources Inventory (GRI) Digital Geologic Data for Colonial National Historical Park colo_geology.pdf Version: 8/18/2015 I Colonial National Historical Park Geologic Resources Inventory Ancillary Map Information Document for Colonial National Historical Park Table of Contents Geolog.i.c. .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 th..e.. .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........................................................... 2 GRI Dig.i.t.a..l. .M...a..p.. .a..n..d.. .S..o..u..r.c..e.. .M...a..p.. .C..i.t.a..t.i.o..n............................................................................... 4 Map Un.i.t. .L..i.s..t.......................................................................................................................... 5 Map Un.i.t. .D..e..s..c..r.i.p..t.i.o..n..s............................................................................................................. 6 Qf - Fill. .(.R...e..c..e..n..t.)........................................................................................................................................................... 6 Qms - M...a..r.s..h.. .s..e..d..i.m...e..n..t. .(.R..e..c..e..n..t.)................................................................................................................................... 6 Qss - S..w...a..m...p.. .s..e..d..i.m..e..n..t. .(..R..e..c..e..n..t.)................................................................................................................................. 6 Qb - Be..a..c..h.. .a..n..d.. .d..u..n..e.. .(.R...e..c..e..n..t.).................................................................................................................................... 6 Qshom. .-. .S...h..e..ll.y.. .O...r.g..a..n..i.c.. .m..u..d.. .(..R..e..c..e..n..t.)......................................................................................................................... 6 Qoy - O..y..s..t.e..r..s.. .(.R..e..c..e..n..t.)................................................................................................................................................ 6 Qpe - P..e..a..t. .(.R..e..c..e..n..t.)...................................................................................................................................................... 6 Qom - O...r.g..a..n..i.c.. .m...u..d.. .(.R..e..c..e..n..t.)........................................................................................................................................ 6 Qsnd -. .S..a..n..d.. .(.R...e..c..e..n..t.).................................................................................................................................................. 7 Qsg - S..a..n..d.. .a..n..d.. .g..r.a..v..e..l. .(.R...e..c..e..n..t.).................................................................................................................................. 7 Qal - A.l.lu..v..i.u..m... .(.R..e..c..e..n..t.)................................................................................................................................................. 7 Qt - Ta.b..b.. .A..l.l.o..f.o..r.m...a..t.i.o..n..,. .u..n..d..iv..i.d..e..d.. .(.l.a..t.e.. .P..l.e..is..t.o..c..e..n..e..)................................................................................................... 7 Qtp - .T..a..b..b.. .A..l.l.o..f.o..r.m...a..t.i.o..n..,. .P..o..q..u..o..s..o..n.. .M..e..m...b..e..r. .(..Q..u..a..t.e..r..n..a..r.y..)................................................................................ 7 Qtlp - .T..a..b..b.. .A...l.lo..f..o..r.m...a..t.io..n..,. .L..y..n..n..h..a..v..e..n.. .a..n..d.. .P..o..q..u..o..s..o..n.. .M...e..m...b..e..r.s..,. .u..n..d..i.v..id..e..d.. .(..Q..u..a..t.e..r..n..a..r.y..).................................. 7 Qtl - T.a..b..b.. .A...l.lo..f..o..r.m...a..t.io..n..,. .L..y..n..n..h..a..v..e..n.. .M...e..m...b..e..r. .(.Q...u..a..t.e..r.n..a..r..y..)............................................................................... 7 Qts - .T..a..b..b.. .A..l.l.o..f.o..r.m...a..t.i.o..n..,. .S..e..d..g..e..f.i.e..l.d.. .M..e..m...b..e..r. .(..Q..u..a..t.e..r..n..a..r.y..)............................................................................... 8 Qeg - E..ls..i.n..g.. .G...r.e..e..n.. .A...ll.o..f.o..r..m..a..t.i.o..n.. .(.l.a..t.e.. .P..l.e..is..t.o..c..e..n..e..)..................................................................................................... 8 Qsh - S..h..i.r.l.e..y.. .A..l.l.o..f.o..r.m...a..t.i.o..n.. .(.m...id..d..l.e.. .P..l.e..is..t.o..c..e..n..e..).......................................................................................................... 8 Qc - Ch..u..c..k..a..t.u..c..k. .A...l.lo..f..o..r.m...a..t.io..n.. .(..m..i.d..d..l.e..(.?..). .P..l.e..i.s..t.o..c..e..n..e..)............................................................................................... 9 Qcc - C..h..a..r.l.e..s.. .C..i.t.y.. .A...ll.o..f.o..r..m..a..t.i.o..n.. .(.e..a..r..ly.. .P..l.e..i.s..t.o..c..e..n..e..)................................................................................................... 9 Qw - W..i.n..d..s..o..r. .F..o..r..m..a..t.i.o..n.. .(.e..a..r..ly.. .P..l.e..i.s..t.o..c..e..n..e..)............................................................................................................... 9 Qm - M...o..o..r.i.n..g..s.. .U..n..i.t. .o..f. .O...a..k..s.. .a..n..d.. .C..o..c..h.. .(.1..9..7..3..).. .(.e..a..r.l.y.. .P..l.e..is..t.o..c..e..n..e..)............................................................................. 10 Qbc -. .B..a..c..o..n..s.. .C..a..s..t.l.e.. .F..o..r.m...a..t.i.o..n.. .(.e..a..r.l.y.. .P..l.e..is..t.o..c..e..n..e..)................................................................................................... 10 Tch - .C..o..l.d.. .H..a..r..b..o..r. .F..o..r.m...a..t.i.o..n.. .(.l.a..t.e.. .P..li.o..c..e..n..e..)............................................................................................................... 10 Tymh .-.. .Y..o..r..k.t.o..w....n.. .F..o..r.m...a..t.io..n..,. .M...o..o..r.e.. .H...o..u..s..e.. .M..e..m...b..e..r. .(..la..t.e.. .P..l.i.o..c..e..n..e..).......................................................................... 11 Tc - Chesapeake Group, Yorktow n and Eastover Formations, undivided (Pliocene and early Plioce.n..e..)..................................................................................................................................................................... 11 GRI So..u..r.c..e.. .M...a..p.. .A..n..c..i.l.l.a..r.y.. .I.n..f.o..r.m...a..t.i.o..n.................................................................................. 14 William..s..b..u..r..g.. .3..0..-. .x.. .6..0..-.M...i.n..u..t.e.. .Q..u..a..d..r..a..n..g..le................................................................................................................... 14 Repo..r.t................................................................................................................................................................ 14 Introduction ............................................................................................................................................... 14 Bottom Sedim.e..n..t. .M...a..p..p..in..g............................................................................................................................. 15 References ............................................................................................................................................... 16 Acknow ledge..m..e..n..t.s.. .f..o..r. .B..o..t.t.o..m... .S..e..d..i.m...e..n..t. .M..a..p..i.n..g........................................................................................ 18 Figures ............................................................................................................................................... 18 Figure 1: Shell ha..s..h.. .-.. .c..o..q..u..in..a............................................................................................................... 18 Figure 2: Sinkhol.e.. .i.n.. .C..o..l.o..n..ia..l. .N..a..t.i.o..n..a..l. .H..i.s..t.o..r.i.c..a..l .P..a..r..k. .b..a..t.t.l.e..f.i.e..l.d........................................................... 19 Figure 3: Continu..o..u..s.. .s..h..o..r.e..l.in..e.. .e..r..o..s..io..n.. .a..t. .Y...o..r.k.. .R..i.v..e..r. .S...t.a..t.e.. .P..a..r.k......................................................... 20 2015 NPS Geologic Resources Inventory Program II Figure 4: Sidesc.a..n.. .s..o..n..a..r. .i.m..a..g..e.. .a..n..d.. .c..h..a..r..t.......................................................................................... 21 Figure 5: Sidesc.a..n.. .im...a..g..e.. .a..n..d.. .c..h..a..r.t..................................................................................................... 21 Figure 6: Yellow. .(.s..u..l.p..h..u..r.).. .c..o..a..t.in..g.. .o..n.. .o..u..t.c..r..o..p..................................................................................... 22 GRI Di.g..i.t.a..l. .D..a..t.a.. .C..r..e..d..i.t.s.......................................................................................................