{"text_format":"dbase-jsonl-2026-09-30","columns":[{"name":"OBJECTID","type":"number","width":10,"decimals":0},{"name":"MapUnit","type":"character","width":10},{"name":"Name","type":"character","width":254},{"name":"FullName","type":"character","width":254},{"name":"Age","type":"character","width":254},{"name":"Descriptio","type":"character","width":254},{"name":"HierarchyK","type":"character","width":254},{"name":"ParagraphS","type":"character","width":254},{"name":"Label","type":"character","width":30},{"name":"Symbol","type":"character","width":254},{"name":"AreaFillRG","type":"character","width":254},{"name":"AreaFillPa","type":"character","width":254},{"name":"Descript_1","type":"character","width":50},{"name":"GeoMateria","type":"character","width":254},{"name":"GeoMater_1","type":"character","width":254},{"name":"Descript_2","type":"character","width":50}],"n_rows":17,"rows_kept":17,"cut":false,"deleted_skipped":0,"read_ended":"whole","bounds":"16MiB/16384/4096/first_that_fit","version":"dbase_level_three","encoding_class":"enc_absent","reader":"statdb_count/9"}
[1,"Qal","Alluvium","Alluvium","Quaternary","Medium to dark grayish brown, locally reddish brown, poorly sorted, unconsolidated cobbles, pebbles, sand, silt.  Locally thicker layers of moderately sorted, rounded cobbles or pebbles reflecting previous locations of stream channel.  Thickness is typic","1-1","Header1","Qal","None","255,255,179","no pattern","DS01","Alluvial sediment","High","DMUID01"]
[2,"Qt","Terrace Deposits","Terrace Deposits","Quaternary","Reddish brown, clayey to sandy matrix containing rounded pebbles to cobbles of sandstone, vein quartz, and quartzite.  These deposits are locally present along current stream levels of Toms Creek and the Monacacy River, but at a higher level than the pre","1-2","Header1","Qt","None","255,242,102","no pattern","DS01","Sedimentary material","High","DMUID02"]
[3,"Qc","Colluvium","Colluvium","Quaternary","Unsorted diamicton containing light gray to reddish gray, angular to subrounded boulders and cobbles of quartzite with a silty matrix.  Present as a thin veneer covering outcrops of the Weverton Formation on the sides of College Mountain and as wedge-sha","1-3","Header1","Qc","None","250,217,128","no pattern","DS01","Colluvium and other widespread mass-movement sediment","High","DMUID03"]
[4,"Jd","Jurassic Dike(s)","Jurassic Dike(s)","Jurassic","Medium to dark gray, medium- to fine-grained, massive diabase.  Weathers to rusty, reddish or orangish brown, spheroidal boulders and cobbles.  Distributed as linear dikes that cut across stratification and massive sills that are subparallel to it.  Dike","2","Header1","Jd","None","255,77,0","no pattern","DS01","Intrusive igneous rock","High","DMUID04"]
[5,"Trtm","Thermally Metamorphosed Rocks","Thermally Metamorphosed Rocks","Triassic","Medium to olive gray, hard, brittle and fractured hornfels and meta-arkose, adjacent to diabase intrusions. Includes dark-gray to olive-black hornfels in contact metamorphic zones that are a few feet wide adjacent to narrow dikes but may be hundreds of f","3","Header1","^tm","None","140,167,189","no pattern","DS01","Contact-metamorphic rock","High","DMUID05"]
[6,"Trg","Gettysburg Formation","Gettysburg Formation","Triassic","Cyclically interbedded reddish gray, laminated, very fine-grained sandstone, sandy siltstone and red to reddish brown shale to rooted mudstone.  Sandstone and siltstone intervals are commonly laminated to cross-laminated and siltstone intervals are mudcr","4","Header1","^g","None","175,217,217","no pattern","DS01","Sandstone and mudstone","High","DMUID06"]
[7,"Trgh","Heidlersburg Member","Gettysburg Formation, Heidlersburg Member","Triassic","Interbedded gray, calcareous siltstone and shale, laminated mudcracked and brecciated limestone, and dark grayish brown to reddish brown siltstone and shale.  Bedding is defined by cycles of gray siltstone and shale grading upward into gray laminated lim","4-1","Header2","^gh","None","27,183,222","no pattern","DS01","Mostly mudstone","High","DMUID07"]
[8,"Trn","New Oxford Formation","New Oxford Formation","Triassic","The New Oxford Formation consists of interbedded, gray, pinkish gray, and reddish brown, fine- to coarse-grained sandstone, brownish red to reddish gray siltstone, red mudstone, shale, and calcareous claystone.  Sandstone or sandstone-dominated intervals","5","Header1","^n","None","171,247,243","no pattern","DS01","Sandstone and mudstone","High","DMUID08"]
[10,"Cfu","Frederick Formation","Frederick Formation","Cambrian","Medium to dark gray, thin- to medium-bedded, pyritic, argillaceous limestone and shaly limestone.  Contains intervals of tan-weathering dolomitic shale and sandy brecciated limestone.  In the Emmitsburg Quadrangle the Frederick Formation is highly sheare","6","Header1","_f","None","255,145,114","no pattern","DS01","Limestone","High","DMUID10"]
[11,"Ch","Harpers Formation","Harpers Formation","Cambrian","Brownish gray to dark greenish gray, silty, phyllitic shale to highly sheared, phyllitic siltstone with intervals of brownish gray, medium-grained, silty sandstone.  Thickness is estimated at greater than 900 feet (275 m) in the Emmitsburg Quadrangle.","7","Header1","_h","None","247,196,222","no pattern","DS01","Sandstone and mudstone","High","DMUID11"]
[12,"Cwo","Owens Creek Member","Weverton Formation, Owens Creek Member","Cambrian","Medium to medium dark gray, medium- to thick-bedded, pebbly, ferruginous metagraywacke with thin layers of dark gray metasiltstone and shale. Some layers are poorly bedded and conglomeratic while others exhibit coarse-grained cross-beds.  This member is","8-1","Header2","_wo","None","212,120,120","no pattern","DS01","Metasedimentary rock","High","DMUID12"]
[13,"Cwm","Maryland Heights Member","Weverton Formation, Maryland Heights Member","Cambrian","Interbedded, dark gray to dark greenish gray, intensely sheared, tuffaceous metasiltstone, metagraywacke, and quartzite. Near the top of the member a thick-bedded to massive, light gray quartzite approximately 30 feet (10 m) thick, represents the main ri","8-2","Header2","_wm","None","247,153,153","no pattern","DS01","Metasedimentary rock","High","DMUID13"]
[14,"Cwb","Buzzard Knob Member","Weverton Formation, Buzzard Knob Member","Cambrian","Light- to medium-gray, thin- to medium-bedded, metaquartzite with thin partings and interbeds of thin, dark gray, fine-grained chloritic layers up to 1.5 inch thick.  Tabular and trough cross-bedding is prominent in the upper part of this member.  The Bu","8-3","Header2","_wb","None","255,222,209","no pattern","DS01","Quartzite","High","DMUID14"]
[15,"CZl","Loudoun Formation","Loudoun Formation","Cambrian-Late Proterozoic","Medium to dark gray, medium-bedded, phyllitic and quartoze conglomerate, and black, tuffaceous phyllite.   The Loudon Formation ranges in thickness from 30 to 200 feet.","9","Header1","_Zl","None","240,179,179","no pattern","DS01","Lower-grade metamorphic rock of unspecified origin","High","DMUID15"]
[16,"Zcm","Catoctin Formation","Catoctin Formation","Late Proterozoic","Massive to sheared and foliated, medium to dark greenish-gray, chloritic, epidote-rich metabasalt.  Some intervals consist of highly sheared chlorite tuffaceous phyllite, or amygdaloidal basalt.  Epidote is distributed as light green veins and amygdule f","10","Header1","Zcm","None","222,204,179","no pattern","DS01","Meta-mafic rock","High","DMUID16"]
[17,null,"Weverton Formation","Weverton Formation","Cambrian","Light gray to gray quartzite and light to medium gray metagraywacke with intervening intervals of dark greenish gray tuffaceous phyllite.  Three members are mapped within the Weverton Formation on Catoctin Mountain in Maryland. In ascending order these a","8","Header3",null,"None",null,null,"DS01","Regional metamorphic rock of unspecified origin",null,"DMUID17"]
[18,"Trns","Sandstone beds","New Oxford Formation, sandstone beds","Triassic","The New Oxford Formation consists of interbedded, gray, pinkish gray, and reddish brown, fine- to coarse-grained sandstone, brownish red to reddish gray siltstone, red mudstone, shale, and calcareous claystone.  Sandstone or sandstone-dominated intervals","5-1","Header1","^ns","None","120,201,168","no pattern","DS01","Sandstone","High","DMUID18"]