IDENTIFIERS

Current Taxon Name (Soil Name): Stronghold

OSD

Series Extent

User Site ID: S1991AZ003002

User Pedon ID: 91AZ003002

Vegetation Plot ID: S1991AZ003002

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - SSL

Lab Pedon # - 92P0270

NCSS Pedon Lab Data NASIS Record ID - 64509

Print Date: 11/12/2024

LOCATION

Location In Web Soil Survey

AOI is roughly a square mile and pedon is marked in the center.

Location in SoilWeb

Location in Google Maps

Std. Latitude: 31.7522221

Std. Longitude: -109.9838867

Datum: WGS84

Township: 19S

Range: 23E

Section: 27

Location Description: Tombstone, Arizona.

State: Arizona

County: AZ003—Cochise

MLRA: 41—Madrean Archipelago

Non-MLRA Soil Survey Area: AZ671—Cochise County, Arizona, Douglas-Tombstone Part

7.5 Minute USGS Quad: 31109-G8—Black Diamond Peak, Arizona

PEDON

Describers Name: Lloyd Law, Jr. and Christopher C. Cochran

Pedon Type: within range of map unit

Pedon Purpose: full pedon description

Pedon Record Orgin: Converted from PDP 3.x

Pedon #: 2

Sampled As Information:

Soil Name - Stronghold

Taxonomic Class - Coarse-loamy, mixed Ustollic Calciorthids

PSC - 25 to 100 cm.

Classificaton Date - 11/19/1991

Moisture Class - ustic

Dynamic Soil Properties:

Erosion Class - 1

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Landscape: hills

Landform: terrace

Geomorphic Component Hills: side slope

Hill Slope Profile: backslope

Slope Position: upper third

Slope Shape Across: concave

Slope Shape Down: concave

Runoff: low

Drainage Class: well

Flooding: none flooding

Ponding: none ponding

Surface Fragments: 60.00 percent

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 11/19/1991 (actual site observation date)

Surface Cover Properties:

Site Obs. Cover Kind 1 - grass/herbaceous cover

Site Obs. Cover Kind 2 - rangeland, grassland

Pedoderm Loose Cover Indicator - no

Drained? - no

Bedded Soil? - no

Forest Plantation? - no

Site Erosion Accelerated: water erosion

Vegetation Plot Plants
Plant Symbol	Scientific Name	National Vernacular Name	Plant Type Group	Canopy Cover %	Vegetation Stata Level
AGSM BOCU EPHED FLCE LADI2	Agropyron smithii Bouteloua curtipendula Ephedra Flourensia cernua Larrea divaricata	— sideoats grama jointfir American tarwort —	— — — — —	— — — — —	— — — — —

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
mollic epipedon calcic horizon	5—48 69—114	—- —-

Setting and Climate
Slope	Slope Length USLE	Upslope Length	Elev.	Corr. Elev	Aspect	MAP	REAP	FFD	MAAT	MSAT	MWAT	MAST	MSST	MWST	MFFP	PE Index	Climate Station ID	Climate Station Name	Climate Station Type
%	m				degrees	mm	mm		C						mm
10	457	25.9	1361	—	140	305	—	—	17.2	—	—	15	—	—	—	—	—	—	—

A1—0 to 3 centimeters (0.0 to 1.2 inches); 90 percent dark yellowish brown (10YR 4/4) crushed, 90 percent brown (10YR 4/3) crushed, moist; very gravelly loamy sand; weak medium and coarse platy structure; soft, very friable, nonsticky, nonplastic; 0.5 very fine and fine roots top of horizon; 0.5 very fine interstitial and tubular pores; 45 percent by volume subangular 2-39-75 millimeter limestone-sandstone-shale fragments; strong effervescence, by hcl, 1n; strongly alkaline, pH 8.5, pH meter; abrupt smooth boundary. Lab sample # 92P01776; dry when described;

A2—3 to 18 centimeters (1.2 to 7.1 inches); 90 percent dark grayish brown (10YR 4/2) crushed, 90 percent very dark grayish brown (10YR 3/2) crushed, moist; gravelly sandy loam; moderate medium and coarse granular structure; soft, very friable, slightly sticky, slightly plastic; 0.5 very fine and fine roots top of horizon; 0.5 very fine and fine interstitial and tubular pores; 30 percent by volume subangular 2-39-75 millimeter limestone-sandstone-shale fragments; strong effervescence, by hcl, 1n; strongly alkaline, pH 8.5, pH meter; clear smooth boundary. Lab sample # 92P01777; dry when described;

Ak—18 to 69 centimeters (7.1 to 27.2 inches); 90 percent brown (10YR 5/3) crushed, 90 percent brown (10YR 4/3) crushed, moist; gravelly sandy loam; weak coarse granular structure; soft, friable, slightly sticky, slightly plastic; 0.5 very fine and fine roots throughout; 0.5 fine interstitial and tubular pores; 30 percent by volume subangular 2-39-75 millimeter limestone-sandstone-shale fragments; strong effervescence, by hcl, 1n; strongly alkaline, pH 8.5, pH meter; gradual smooth boundary. Lab sample # 92P01778; dry when described;

Bk—69 to 114 centimeters (27.2 to 44.9 inches); 80 percent light gray (10YR 7/2) exterior and 20 percent white (10YR 8/1), 80 percent yellowish brown (10YR 5/4) exterior, moist; gravelly sandy loam; weak fine subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; 0.5 very fine and fine roots throughout; 0.5 fine tubular pores; 75 percent medium and coarse irregular carbonate nodules; 25 percent by volume subangular 2-39-75 millimeter limestone-sandstone-shale fragments; violent effervescence, by hcl, 1n; strongly alkaline, pH 8.5, pH meter; gradual smooth boundary. Lab sample # 92P01779; dry when described;

Ck1—114 to 188 centimeters (44.9 to 74.0 inches); 80 percent light brown (7.5YR 6/3) exterior and 20 percent brown (7.5YR 5/4), 80 percent brown (7.5YR 4/4) exterior, moist; gravelly sandy loam; massive; hard, friable, slightly sticky, moderately plastic; 0.5 very fine and fine roots throughout; 0.5 fine tubular pores; 20 percent by volume subangular 2-39-75 millimeter limestone-sandstone-shale fragments; violent effervescence, by hcl, 1n; strongly alkaline, pH 8.5, pH meter. Lab sample # 92P01780; dry when described;