The dataset for the Tularosa Mountains quadrangle consists of six coverages:
tulgeop
tulflt
tulgline
tulgpnt
tuldpnt
tullndec
The coverage tullndec is not a "true" ARC/INFO coverage. It consists of various symbols drawn as arcs.
The tulgeop coverage consists of polygons that are map units and arcs that are contacts and color boundaries (other than contacts).
The tulgeop.pat INFO file consists of the following items:
TYPE--Refers to the type of polygon: in this database the only type in this coverage is "map unit." To interpret the map unit symbols, refer to the explanation of unit symbols as coded by NAME.
NAME--Refers to the map unit name and associated symbol.
Items in tulgeop.pat are defined as follows:
SURFICIAL DEPOSITS
Qa Alluvium (Holocene)
Qsa Playa alluvium of the Plains of San Agustin (Holocene)
Deposits of prehistoric lake San Agustin
Qsb Bar and barrier ridge deposits (Holocene and Pleistocene)
Qsfd Fan delta deposits (Holocene and Pleistocene)
Qss Shoreline deposits (Holocene and Pleistocene)
Qac Colluvium and alluvium (Holocene and Pleistocene)
Ql Landslide deposits (Holocene and Pleistocene)
Qp Piedmont slope deposits (Pleistocene)
VOLCANIC AND VOLCANICLASTIC ROCKS
Volcaniclastic rocks of the Gila Group
QTg Gila Group, undivided (Pleistocene(?) to early Miocene)
QTgu Upper Gila Group (Pleistocene(?) to middle Miocene)
QTgl Lower Gila Group (middle to early Miocene)
QTs Volcaniclastic rocks of the Santa Fe Group (Pleistocene to Miocene)
Volcanic rocks interlayered with the Gila Group
QTb Basalt (Pleistocene and Pliocene, 0.9-2.5 Ma)
QTd Basalt dikes (Pleistocene and Pliocene)
QTbc Basalt scoria (Pleistocene and Pliocene)
Tb Basalt, andesite, and dacite, undivided (Miocene)
Tbd Basalt dikes (Miocene)
Tbcc Basaltic scoria, cinders, and bombs (Miocene)
Tfb Basalt on Flat Top Mesa (Miocene, 9 Ma) Rocks of Apache Peak volcano
Taa Andesite at Apache Peak (Miocene, 10.6 Ma)
Rocks of Eagle Peak volcano
Tedp Central dacite plug (Miocene, 11.4 Ma)
Tedu Upper dacite flows (Miocene)
Tedl Lower andesite and dacite flows (Miocene, 12 Ma)
Tedw Wilson Canyon andesite flows (Miocene)
Tedm Milligan Mountain andesite-dacite flows Miocene, 12 Ma)
Ted Andesite dike at Dry Mesa (Miocene)
Rocks of Horse Mountain volcano
Thv Predominantly dacitic, rhyolitic to andesitic lava flows (Miocene, 12-14 Ma)
Thd Northwest-trending, andesitic-dacitic breccia dikes (Miocene)
Tht Pyroclastic rocks (Miocene)
Thp Dacite plug (Miocene)
Thdr Aplite dikes (Miocene)
Thb Vent(?) breccia (Miocene)
Tha Megacrystic andesite lava flow (Miocene, 12 Ma)
Tsb Basalt of Saliz Hill (Miocene, 12.2 Ma)
Tkb Basalt at Kiehnes Canyon (Miocene, 13.5 Ma)
Rocks of John Kerr Peak volcano
Tjr Rhyolite domes and flows (Miocene,13 Ma)
Tmr Rhyolite near Maverick Peak (Miocene, 14 Ma)
Tmrd Rhyolite dike in rhyolite near Maverick Peak (Miocene)
Tli Porphyritic quartz-diorite intrusions at Wet Leggett Spring (Miocene,15 Ma)
Volcaniclastic rocks of the Spears Group (Oligocene and Eocene)
Tsu Upper Spears Group (Oligocene)
Tsl Lower Spears Group, undivided (Oligocene and Eocene)
Tslw White sandstone sequence of lower Spears Group (Eocene)
Tslg Green to gray sandstone sequence of lower Spears Group (Eocene)
Tpu Upper Pueblo Creek Formation (Oligocene and Eocene)--Units Tt and Tt1-4 are discontinuous, thin (0 to about 5 m thick) Datil Group ignimbrites interlayered in upper Pueblo Creek Formation
Tpl Lower Pueblo Creek Formation (Eocene)
Volcanic rocks of the Mogollon Group (Miocene and Oligocene)
Tmgu Mogollon Group, undivided (Miocene and Oligocene)
Tad Andesite dikes (Miocene and Oligocene)
Bearwallow Mountain Andesite (Oligocene, 25-26 Ma)
Tba Basaltic-andesite to dacite lava flows (Oligocene)
Tbad Andesitic dike (Oligocene)
Tbap Andesite plugs (Oligocene)
Tbac Andesitic cinder and scoria deposits(Oligocene)
Thr Rhyolite of Hay Canyon (Oligocene?)
Tfr Rhyolite at Frying Pan Creek (Oligocene?)
Tsr Rhyolite of Stallings Tank (Oligocene)
Tct Tuff of Triangle C Ranch (Oligocene, 28.1 Ma)
Tbt Bloodgood Canyon Tuff (Elston, 1976)(Oligocene, 28.1 Ma)
Tca Basaltic-andesite of Cottonwood Canyon (Oligocene)
Tst Shelley Peak Tuff (Oligocene, 28.1 Ma)
Taylor Creek Rhyolite and associated rocks
Tgt Tuff of Garcia Camp (Oligocene, 28.1 Ma)
Ttr Taylor Creek Rhyolite (Oligocene, 28.1 Ma)
Tsa Squirrel Springs Canyon Andesite(Oligocene, 28.5 Ma)
Tvt Vicks Peak Tuff(Oligocene, 28.6 Ma)
Tgr Rhyolite of Gwynn Canyon (Oligocene, 28.7 Ma)
Tlt La Jencia Tuff (Oligocene, 28.9 Ma)
Tdt Davis Canyon Tuff (Oligocene, 29.0 Ma)
Ta Andesite flows (Oligocene)
Tbr Rhyolite of Bat Cave Wells(Oligocene)
Rocks of Telephone Canyon volcano
Tta Andesite of Telephone Canyon, undivided (Oligocene, 32.9-29.7 Ma)
Volcanic rocks of the Datil Group (Oligocene and Eocene)
Tdgu Datil Group, undivided (Oligocene and Eocene)
Tcbt Caballo Blanco Tuff(Oligocene, 31.6 Ma)
Thmt Hells Mesa Tuff (Oligocene, 32.1 Ma)
Tt Distal outflow of regional ignimbrites (Oligocene and Eocene)-- Labeled Tt-Tt4 where present in sequence
Rocks of Saddle Mountain volcano
Tas Andesite lava flows (earliest Oligocene or latest Eocene, about 33.3 Ma)
Tasb Andesite agglomerate (Oligocene or Eocene)
Tasd Andesite dikes (Oligocene or Eocene)
Tsca Andesitic intrusive-extrusive complex of Saliz Canyon (Eocene)
Tscb Andesitic vent(?) breccia (Eocene, 33.6 Ma>
Tla Andesite of Dry Leggett Canyon (Eocene)
Tlai Possible plug or vent for andesite of Dry Leggett Canyon (Eocene)
Rocks of Horse Springs volcano or volcanic center
Thsd Horse Springs dacite (Eocene, 33.7 Ma)
Thsb Megabreccia and mesobreccia (Eocene)
Tbct Blue Canyon Tuff (Eocene, 33.7 Ma)
Trt Rock House Canyon Tuff (Eocene, 34.4 Ma)
Tbrt Blue Canyon and Rock House Canyon Tuffs, undivided (Eocene)
Tlwt Tuff of Lebya Well (Eocene, 34.7 Ma)
Tpt Tuff of Bishop Peak (Eocene, 34.6 Ma)
Tkt Kneeling Nun Tuff (Eocene, 34.9 Ma)
Tft Tuff of Farr Ranch(Eocene, 35.6 Ma)
Twt Datil Well Tuff (Eocene 35.5 Ma)
Twft Datil Well Tuff and (or) tuff of Farr Ranch, undivided (Eocene)
Tac Basaltic lava flow of Alamocito Canyon (Eocene)
OLDER SEDIMENTARY ROCKS
Sedimentary rocks, undivided (Permian)
The tulgeop.aat INFO file consists of the following items:
TYPE_L--Refers to the type of arc and is one of the following:
"contact" or "colorboundary."
ACCURACY--Refers to accuracy of location of arcs in the gpoly coverage and is one of the following: "certain" or "gradational" (used between facies of the Upper Pueblo Creek Formation).
The tulflt coverage consists of arcs that are faults.
The tulflt.aat INFO file consists of the following items:
TYPE--Refers to the type of arc; the only type in this coverage is "fault."
FAULTTYPE--Refers to the type of fault; the only type in this coverage is "normal."
ACCURACY--Refers to accuracy of location of arcs in the tulflt coverage
and is one of the following: "certain," "approximate," or "concealed."
DIPVALUE--Refers to amount of dip on fault, in degrees, where known; a value of 0 was arbitrarily entered in this field for faults where no dip was determined or known.
DIPDIRECTION--Refers to direction of dip on fault, where known, and is given as N (north), NE (northeast), E (east), SE (southeast), S (south), SW (southwest), W (west), or NW (northwest).
The tulgline coverage consists of arcs that are landslide scarps, caldera margins, tuffs, dikes, or fault/dikes (dikes that intrude faults).
The tulgline.aat INFO file consists of the following items:
TYPE--Refers to the type of arc and is one of the following: "dike," "fault/dike," "tuff," "landslide scarp," or "caldera margin."
ACCURACY--Refers to accuracy of location of caldera margin in the tulline coverage; the caldera margin is coded as "inferred."
NAME--Applicable only to "dike," "fault/dike," or "tuff" and refers to the map unit name or, in the case of an unnamed rhyolite dike, the symbol "rd."
Items in tulgline.aat are defined as follows:
Volcanic rocks interlayered with the Gila Group
QTd Basalt dikes (Pleistocene and Pliocene)
Tbd Basalt dikes (Miocene)
Rocks of Eagle Peak volcano
Ted Andesite dike at Dry Mesa (Miocene)
Rocks of Horse Mountain volcano
Thd Northwest-trending, andesitic-dacitic brecciadikes (Miocene)
Thdr Aplite dikes (Miocene)
Rhyolite near Maverick Peak (Miocene, 14 Ma)
Tmrd Rhyolite dike in rhyolite near Maverick Peak (Miocene)
Volcanic rocks of the Mogollon Group (Miocene and Oligocene)
Tad Andesite dikes (Miocene and Oligocene)
Bearwallow Mountain Andesite (Oligocene, 25-26 Ma)
Tbad Andesite dike (Oligocene)
Volcanic rocks of the Datil Group (Oligocene and Eocene)
Tt Distal outflow of regional ignimbrites (Oligocene and Eocene)-- Labeled Tt2-4 where present in sequence
Rocks of Saddle Mountain volcano
Tasd Andesite dikes (Oligocene or Eocene)
Tpt Tuff of Bishop Peak (Eocene, 34.6 Ma)
rd Rhyolite dike (mapped only in Upper Pueblo Creek Formation and in Bloodgood Canyon Tuff)
The tulgpnt coverage consists of points that are localities of strike and dip measurements on sedimentary bedding surfaces and compaction foliation of ignimbrites (ash-flow tuffs); also includes locations
of volcanic centers or vents.
The tulgpnt.pat INFO file consists of the following items:
TYPE--Refers to the type of point or surface measured and is one of the following: "bedding surface," "foliation," or "volcanic center/vent."
DIPVALUE--Refers to the angle made by the intersection of the bedding surface or foliation with the horizontal; ranges from 0º to 90º
VOLCANICNUMBER--Refers to number assigned to a volcanic center or vent for descriptive purposes; volcanic centers and vents are numbered 1-26
POSITION--Refers to the attitude of measured surfaces and is one of the following: "inclined" or "horizontal."
ACCURACY--Refers to the accuracy of the strike and dip of surfaces and is one of the following: "measured" or "apparent."
SYMBOLANGLE--Refers to the rotation of the symbol used to plot the feature; NOT a measurement of actual orientation
of the feature (see STRIKEANGLE for the compass quadrant bearing).
STRIKEANGLE--Refers to the trend of a surface as it intersects the horizontal; recorded as compass
quadrant bearings, e.g., N66W
DIPDIRECTION--Refers to direction of dip of bedding surface or foliation, and is given as N (north), NE (northeast), E (east), SE (southeast), S (south), SW (southwest), W (west), or NW (northwest).
VOLCANICAGE--Refers to the age of the volcanic center or vent in millions of years (Ma), where determined.
The tuldpnt coverage consists of points that are locations of test wells and road metal quarries.
The tuldpnt.pat INFO file consists of the following items:
GEOCODE--Refers to the type of point and is one of the following: "oil well," "climate well," or "quarry."
NAME--Gives the full name of the well, either "SWEPI No. 1 oil test well" or "600-m Oberlin University climate test well."
The tullndec coverage consists of arcs that are line decorations: bar and ball symbols that show displacement on faults, arrows that show dip direction on faults, and arrows used to indicate the gradational contact between facies of the upper Pueblo Creek Formation of the Spears Group (annotations: AF, alluvial facies; VF, vent facies).
The tullndec.aat INFO file consists of the following items:
DIPVALUE--Refers to amount of dip on fault, in degrees, where known; a value of 0 was arbitrarily entered in this field for faults where no dip was determined or known.
DIPDIRECTION--Refers to direction of dip of a fault, and is given as N (north), NE (northeast), E (east), SE (southeast), S (south), SW (southwest), W (west), or NW (northwest).
