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Physiographic Map of Maryland 422308 ! 79°00'W ! ! 78°30'W ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! 78°00'W ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! 76°00'W ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! 76°30'W ! ! ! ! 77°30'W 77°00'W ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! 112700 ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! 218000 ! 422303 ! ! ! 216000 ! ! ! 112100 ! 217000 ! ! ! ! ! ! 218001 ! ! ! 215000 ! 312002 ! ! ! ! 422100 ! ! ! ! ! 222100 ! 424001 ! 112500 ! ! ! ! ! ! 424000 ! 422301 212000 ! ! ! 223100 ! ! ! ! 222200 ! ! ! ! ! 112701 A l l e g a n y ! 422300 ! ! ! ! ! ! ! ! ! 112600 422302 ! ! ! ! ! ! 112301 ! ! ! ! ! 214000 ! 211100 ! 312000 ! 412100 ! ! ! ! ! 423100 ! ! ! ! C e c i l ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! W a s h i n g t o n ! G a r r e t t ! ! ! ! ! ! ! ! 421200 213000 ! 112200 ! ! ! 426100 Appalachian Plateaus 511101 ! Blue Ridge ! ! ! ! ! Ridge and Valley Piedmont Plateau ! ! ! ! ! ! ! 422101 ! ! ! 422305 ! ! ! ! ! ! ! ! ! Province ! ! C a r r o l l ! Province ! Province Province ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! 224100 211100 ! ! ! 422300 ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! 221100 ! ! ! ! ! ! ! ! H a r f o r d ! ! ! ! ! ! Allegheny Mountain ! ! ! ! ! ! ! ! ! ! ! ! Section ! ! ! 511100 ! ! ! ! ! 112501 ! 112300 ! 313100 ! B a l t i m o r e ! ! Great Valley ! ! ! ! ! 224200 F r e d e r i c k ! ! ! ! ! Folded Appalachian ! 422100 Section 78°00'W ! Upland Section ! ! ! ! ! ! 512100 ! ! ! 425102 ! ! ! Mountain Section Western Shore ! 423200 ! ! ! ! ! ! ! ! ! ! ! ! Lowlands Region ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Northern Blue ! ! ! ! ! ! ! 112702 ! ! ! ! 422403 ! ! ! ! Ridge Section ! 425100 ! ! ! ! ! 223100 ! ! ! ! ! ! ! ! ! ! N ! ! ! ! 425101 ' ! ! ! ! ! ! ! ! ! ! ! ! 0 ! ! ! ! ! ! ! Lowland 3 ! ! 3 ! ° ! ! ! n ! 112201 ! ! Section 9 o 9 i ! ! ° Major Physiographic ! g 3 ! ! ! 3 e ! ! ! 426100 ! ! ! 0 ! R ! ! 422304 ! ! 514100 ! ! ! ! ! ! ! y ' ! 224201 Subdivisions ! 78°30'W 422305 ! ! N ! r ! ! ! ! ! Western Shore ! ! ! a ! ! ! ! ! ! ! ! u ! ! t Delmarva Peninsula ! ! ! Uplands Region ! ! ! in Maryland s ! ! ! ! 4 112700 ! ! E Region ! ! ! ! ! ! ! e ! ! 112401 ! ! k ! ! 313200 ! ! ! a ! 111100 ! ! ! ! ! ! e ! ! ! 312001 p ! ¯ ! ! a ! ! 112400 ! ! 422305 s ! ! ! ! e ! ! ! 422306 512100 h ! ! ! C ! ! ! 79°00'W 0 10 20 40 Miles ! ! ! ! ! ! ! ! ! ! ! 423300 ! ! ! 426101 ! ! ! ! ! 511200 ! ! ! ! 0 12.5 25 50 Kilometers ! 425200 ! ! ! ! ! 413100 ! DRAFT ! ! 425102 ! ! 112400 ! ! ! ! ! 422307 ! ! 314100 Coastal Plain ! ! ! ! ! ! ! 511201 Province ! ! 221100 425100 Legend ! ! ! ! ! Embayed Section ! ! 313201 ! ! ! 112200 ! ! ! ! Province Boundary ! ! ! 314000 ! ! ! ! 422501 ! ! ! ! ! ! ! ! 412200 ! 112402 ! ! ! 426100 ! ! ! ! ! ! Physiographic Map of Maryland 422308 ! ! 422200 ! ! ! ! ! ! ! ! 511200 ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! 422500 ! ! ! ! ! ! B a l t i m o r e K e n t ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! C i t y ! ! ! By James P. Reger and Emery T. Cleaves ! 311100 ! ! ! ! ! H o w a r d ! ! ! ! 514100 ! ! ! ! 422400 ! ! STATE OF MARYLAND ! ! ! 422401 422309 ! ! ! Martin O’ Malley 512100 ! ! ! ! ! ! ! ! ! ! Governor ! ! 2008 ! ! ! ! ! 422402 ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! 0 2 4 8 12 16 ! ! ! 511301 ! ! ! Miles 426102 ! ! 77°30'W ! ! ! ! ! ! 422300 ! 0 3.5 7 14 21 28 ! ! ! ! ! Kilometers ! ! 514400 ! 422500 ! ! ! ! ! ! ! 511300 ! ! ! ! ! ! ! ! 412200 M o n t g o m e r y ! ! ! ! 100000. 200000. 300000. 400000. 500000. A n n e A r u n d e l ! ! ! 426100 ! ! 513000 ! ! A PP A LA C HI AN P L AT E AU S P RO V IN C E R I D G E A N D V A L L E Y P R O V I N C E B L U E R I D G E P R O V I N C E PIEDMONT PLATEAU PROVINCE A T L A N T I C C O A S T A L P L A I N P R O V IN C E ! ! Plateau of moderately to thoroughly dissected roughly horizontal sedimentary An "accordion-like" topography composed of alternating, subparallel ridges and In Maryland, the Province consists of two prominent ridges separated in the Mostly a broadly undulating to rolling topography underlain by metamorphic A seaward sloping plain extending from Cape Cod to the southern tip of Florida. 422310 ! ! ! rock; elevations rise from west to east; landscape varies with Section. valleys resulting from differential erosion of various folded and faulted southern half by the rolling to hilly Middletown Valley. rocks and whose relief is increased locally by low knobs or ridges and valleys. In Maryland, consists of a fairly flat to moderately rolling upland and an even ! ! DEPARTMENT OF NATURAL RESOURCES ! ! 110000. Allegheny Mountain Section. Wide ridges separated by lithologies. On the west are lowlands developed either on Mesozoic clastics or early flatter lowland. ! ! John R. Griffin 310000. Northern Blue Ridge Section. Consists of two prominent ridges ! 411100 Q u e e n A n n e ' s ! ! Paleozoic carbonates. ! ! broad valleys; plunge direction on broad folds produces topographic ! ! ! 210000. Folded Appalachian Mountains Section. Alternating, 510000. Embayed Section. Characterized by estuaries and embayments ! (South and Catoctin Mountains) that merge northeastward into a single ! ! ! ! ! ! ! Secretary ! basins (“canoe” -shaped valleys). 410000. Piedmont Lowland Section. A valley consisting of both a ! subparallel ridges and valleys; generally increase in elevation east to west; attributed to the drowning of river mouths and formation of barrier ! hilly to mountainous area. In the southern part of the Section in ! 511302 ! ! relative spacing and width of ridges and valleys relate to fold limestone valley and parts of two Mesozoic rift basins. 422 310. Hunting Hill Area. T he largest of islands associated with post-glacial sea-level rise. Terrain is fairly 512 100. Aberdee n Estuaries a nd Lowlands ! 511400 514100 Maryland, a central valley (Middletown Valley) occurs along the fold ! ! 111000. Chesapeake Gorges Region. Generally steep-sided ! wavelength and amplitude and to attitude, thickness and erosional several mafic and ultramafic bodies in the southern flat to moderately rolling; upland bounded by flat lowlands. D i s t r i c t . A relatively featureless lowland (mostly <50 ft ! axis. 411000. Chesapeake Gorges Region. Two major gorges ! gorge coinciding with the Potomac River valley; in some places ! ! ! resistance of the rocks. part of the Hampstead Upland; the Area stands out elevation) along the NW shore of Chesapeake Bay. The ! parallel to regional geologic structure, in other places transverse to comprise the Region, those of the Potomac and Susquehanna Rivers, 511000. Western Shore Uplands Region. A flat to rolling upland ! ! 311000. Chesapeake Gorges Region. Generally a steep-sided ! 512200 because it is less dissected and has broader, gentler District has a very irregular coastline indented by the 3 structure. both originating in the Appalachian Plateaus Province. In the surface underlain by Cretaceous to Pliocene sediments. Markedly ! 211000. Chesapeake Gorges Region. Varies between a steep- 9 ! gorge with very limited flood plain development. ! ! Piedmont Lowland the Potomac occupies a well-defined flood plain. slopes than the surrounding upland. higher elevations and greater relief than the Eastern Shore. flooded mouths of the Bush, Bird, Middle, Back and ° 0 sided gorge and broader, shallower, but still steep-sided, valley N ' 111100. Upper Potomac Gorge District. ! ! Patapsco Rivers. 0 311100. Middle Potomac Gorge District. Steep- 0 Fluvial and estuarine terraces flank the major drainages, most ! ! with some flood plain development. 422400. Mt. Airy Upland District. Rolling 511401 ' 411100. Middle Potomac Floodplain District. N 0 Generally steep-sided gorge of the Potomac River; tends to ! ! sided gorge in quartzite at Elk Ridge and South Mtn; riffles ! ° ! notably the Patuxent River. ! upland; herringbone texture due to interaction of thin ! 511300 512200. Annapolis Estuaries and Lowlands The Potomac River occupies a narrow flood plain, but has 9 ! ! parallel the regional strike of bedrock geologic structure; in 211100. Upper Potomac Gorge District. Steep- where Potomac flows over steeply dipping resistant beds; ! 3 ! ! ! siltstones and quartzites with stream reaches controlled by District. ! ! A relatively featureless lowland (mostly <50 ft not developed a meandering stream habit. Several cobble- ! ! its lower reach, transverse to strike. ! 511100. Elk Neck Peninsula District. With sided gorge, most slopes >15 degrees, some >20 degrees; river incised >100 ft with narrow, discontinuous flood plain ! ! ! ! ! joints oblique to bedrock strike; streams often incised (e.g., elevation) along the west-central shore of Chesapeake Bay; ! ! veneered bedrock islands occupy much of the channel. ! ! ! ! ! elevations exceeding 200 feet, the peninsula is a prominent ! ! ! 112000. Allegheny High Plateau Region. Erosion of the folds cliffs common; limited flood plain; incised meanders; across granitic Middletown and Pleasant (Rohrersville) ! ! ! Bennett, Little Bennett, Bush, Linganore, and Israel it has a less irregular coastline than
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