ILLUSTRATED FLORA OF EAST TEXAS - Brit - Botanical Research ...

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GENERAL GEOLOGY OF EAST TEXAS/INTRODUCTION 39 FIG.19/ILLUSTRATION SHOWING HOW FROM WEST TO EAST ACROSS EAST TEXAS, PROGRESSIVELY YOUNGER WEDGES OF SEDIMENT ARE NOW EXPOSED AT THE SURFACE,“ARRANGED LIKE A TIPPED STACK OF BOOKS,” WITH THE YOUNGEST FOUND NEAR THE PRESENT-DAY GULF COAST (ADAPTED FROM ROADSIDE GEOLOGY OF TEXAS,DARWIN SPEARING, 1991, ©MOUNTAIN PRESS PUBLISHING COMPANY,MISSOULA,MT). FIG.20/CROSS SECTION OF THE GULF COAST, SHOWING YOUNGEST, POST-TERTIARY (PLEISTOCENE AND HOLOCENE) SEDIMENTS CLOSEST TO AND UNDER THE GULF (ADAPTED FROM ROADSIDE GEOLOGY OF TEXAS, DARWIN SPEARING, 1991, ©MOUNTAIN PRESS PUBLISHING COMPANY, MISSOULA,MT). In the very southeastern part of East Texas closest to the coast (e.g., southern part of the Big Thicket around and north of Beaumont), even younger, post-Tertiary sediments are found at the surface (Fig. 20). These are Pleistocene (Ice Age) sediments (e.g., Lissie and Beaumont) deposited during interglacial periods between approximately 1.8 million and 8,000 years ago. They are nearly flat and represent the modern Gulf Coastal Plain. Also during the Pleistocene, and even more recently during the Holocene (8,000 years ago to the present), sands were deposited along the streams of East Texas. Some of these sands were moved by the vast quantities of water from melting Ice Age glaciers. Large deposits of such sand can be seen along some drainages, with sub-fossils (e.g., bison skulls) sometimes still found as the flood plain sands shift or are removed for human purposes (Bullard 1931; Sellards et al. 1932; Shuler 1935, 1937; Albritton 1942; Renfro et al. 1973; McGowen et al. 1991; Spearing 1991). In order to fit the geology of East Texas into the broader picture of the state as a whole, a brief description of the areas to the west can be helpful. Directly to the west of most of East Texas lie the Cross Timbers and Prairies and Edwards Plateau, both underlain primarily by Cretaceous materials. As one moves progressively west from the Gulf through these regions, the rocks become older and older, a continuation of the same trend seen in East
40 INTRODUCTION/GENERAL GEOLOGY OF EAST TEXAS FIG.21/TECTONIC MAP OF TEXAS.USED WITH PERMISSION OF THE BUREAU OF ECONOMIC GEOLOGY,UNIV. OF TEXAS AT AUSTIN.
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ILLUSTRATED FLORA OF EAST TEXAS
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ALLDREDGE, LINDA & JACK BATTERBAE,
Page 5 and 6: We would like to recognize and expr
Page 7 and 8: ISSN 0833-1475 ISBN 1-889878-12-X S
Page 9 and 10: “DEEP EAST TEXAS IS AN OLD, QUIET
Page 11 and 12: Elray S. Nixon E lray Nixon was bor
Page 13 and 14: ILLUSTRATED FLORA OF EAST TEXAS TAB
Page 15 and 16: TABLE OFCONTENTS/ PAGE APPENDICES A
Page 17 and 18: Hymenocallis liriosme
Page 19 and 20: ILLUSTRATED FLORA OF EAST TEXAS OVE
Page 21 and 22: 4 INTRODUCTION/GEOGRAPHIC AREA OF E
Page 27 and 28: 10 INTRODUCTION/MAJOR RIVERS OF EAS
Page 29 and 30: 12 INTRODUCTION/PLANTS TREATED The
Page 31 and 32: 14 INTRODUCTION/GUIDE TO ARRANGEMEN
Page 33 and 34: 16 INTRODUCTION/GUIDE TO SOURCES OF
Page 35 and 36: 18 INTRODUCTION/GUIDE TO GEOGRAPHIC
Page 37 and 38: 20 INTRODUCTION/GUIDE TO ENDANGERED
Page 39 and 40: 22 INTRODUCTION/GUIDE TO GLOSSARY,
Page 41 and 42: 24 INTRODUCTION/GUIDE TO ABBREVIATI
Page 43 and 44: 26 INTRODUCTION/SUMMARY DATA ON FLO
Page 45 and 46: 28 INTRODUCTION/ACKNOWLEDGMENTS Kar
Page 47 and 48: 30 INTRODUCTION/AUTHORS’ NOTE Pre
Page 49 and 50: 32 INTRODUCTION/GENERAL GEOLOGY OF
Page 55: 38 INTRODUCTION/GENERAL GEOLOGY OF
Page 63 and 64: 46 INTRODUCTION/SOILS SOIL ORDER DE
Page 65 and 66: 48 INTRODUCTION/SOILS, EAST TEXAS B
Page 67 and 68: 50 INTRODUCTION/SOIL-RELATED GEOLOG
Page 77 and 78: 60 INTRODUCTION/SOILS OF BLACKLAND
Page 83 and 84: 66 INTRODUCTION/CLIMATE OF EAST TEX
Page 93 and 94: Forests define East Texas, and to a
Page 95 and 96: 78 INTRODUCTION/GEOLOGY OF PINEYWOO
Page 97 and 98: 80 INTRODUCTION/PRESETTLEMENT, EARL
Page 105 and 106: 88 INTRODUCTION/PRESETTLEMENT VEGET
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90 INTRODUCTION/CURRENT VEGETATION
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106 INTRODUCTION/POST OAK SAVANNAH
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110 INTRODUCTION/GEOLOGY AND SOILS
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112 INTRODUCTION/SOILS, FIRE, AND T
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114 INTRODUCTION/SOILS, FIRE, AND T
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116 INTRODUCTION/ PRESETTLEMENT, EA
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118 INTRODUCTION/VEGETATION OF POST
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124 INTRODUCTION/CONDITIONS TODAY O
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128 INTRODUCTION/RED RIVER AREA are
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130 INTRODUCTION/BLACKLAND PRAIRIE
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132 INTRODUCTION/GEOLOGY OF BLACKLA
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134 INTRODUCTION/PRESETTLEMENT AND
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144 INTRODUCTION/VEGETATION OF BLAC
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146 INTRODUCTION/FUTURE OF BLACKLAN
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148 INTRODUCTION/FUTURE OF BLACKLAN
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150 INTRODUCTION/CADDO LAKE LOCATIO
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152 INTRODUCTION/CADDO LAKE FIG.84/
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154 INTRODUCTION/PRESENT AND FUTURE
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156 INTRODUCTION/BIG THICKET THE BI
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158 INTRODUCTION/BIG THICKET GEOGRA
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160 INTRODUCTION/NATURAL HISTORY OF
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172 INTRODUCTION/SUMMARY DEFINITION
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184 INTRODUCTION/HISTORY OF BIG THI
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190 INTRODUCTION/CONSERVATION IN BI
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200 INTRODUCTION/ORIGIN AND DIVERSI
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228 INTRODUCTION/CONSERVATION IN EA
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234 INTRODUCTION/HISTORY OF BOTANY
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244 INTRODUCTION/BOTANY IN NORTH CE
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246 INTRODUCTION/BOTANY IN NORTH CE
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248 INTRODUCTION/BOTANY AT UNIVERSI
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250 INTRODUCTION/BOTANY AT TEXAS A&
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252 INTRODUCTION/BOTANY AT TEXAS A&
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254 INTRODUCTION/OTHER CONTRIBUTION
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256 INTRODUCTION/CURRENT BOTANICAL
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258 INTRODUCTION/BOTANICAL ART IN E
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ILLUSTRATED FLORA OF EAST TEXAS - Brit - Botanical Research ...

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