*** Primary Characterization Data *** |
Pedon ID: S1999ND057001 | ( Mercer, North Dakota ) | Print Date: Nov 11 2024 8:38PM |
Sampled as on Apr 3, 1999: | Williams ; Fine-loamy, mixed, superactive, frigid Typic Argiustolls |
Revised to SSL: | (unnamed) ; Fine-loamy, mixed, superactive, frigid Typic Argiustoll |
United States Department of Agriculture | ||||
SSL | - | Project | CP00NL104 MLRA 56 | Natural Resources Conservation Service |
- | Site ID | S1999ND057001 MLRA: 53B | National Soil Survey Center | |
- | Pedon No. | 00P0598 | Soil Survey Laboratory | |
- | General Methods 1B1A, 2A1, 2B | Lincoln, Nebraska 68508-3866 |
Layer | Horizon | Orig Hzn | Depth (cm) | Field Label 1 | Field Label 2 | Field Label 3 | Field Texture | Lab Texture |
00P04021 | A1 | A1 | 0-6 | L | SIL | |||
00P04022 | A2 | A2 | 6-15 | L | CL | |||
00P04023 | Bt | Bt1 | 15-35 | CL | CL | |||
00P04024 | Btk | Btk | 35-52 | CL | CL | |||
00P04025 | Bk | Bk | 52-91 | CL | CL | |||
00P04026 | BCk | BCk | 91-123 | CL | CL | |||
00P04027 | C | C | 123-150 | CL | CL |
Pedon Calculations | |||
Calculation Name | Result | Units of Measure | |
CEC Activity, CEC7/Clay, Weighted Average | 0.72 | (NA) | |
Clay, carbonate free, Weighted Average | 30 | % wt | |
Weighted Particles, 0.1-75mm, 75 mm Base | 18 | % wt | |
Volume, >2mm, Weighted Average | 1 | % vol | |
Clay, total, Weighted Average | 33 | % wt | |
Weighted averages based on control section: 15-52 cm |
PSDA & Rock Fragments | -1- | -2- | -3- | -4- | -5- | -6- | -7- | -8- | -9- | -10- | -11- | -12- | -13- | -14- | -15- | -16- | -17- | -18- | |||
(- - - - - Total - - - - - -) | (- - Clay - - -) | (- - - - Silt - - - - -) | (- - - - - - - - - - - - Sand - - - - - - - - - - - -) | ( Rock Fragments (mm) ) | |||||||||||||||||
Lab | Clay | Silt | Sand | Fine | CO3 | Fine | Coarse | VF | F | M | C | VC | (- - - - - - - - Weight - - - - - - - -) | >2 mm | |||||||
Text- | < | .002 | .05 | < | < | .002 | .02 | .05 | .10 | .25 | .5 | 1 | 2 | 5 | 20 | .1- | wt % | ||||
Depth | ure | .002 | -.05 | -2 | .0002 | .002 | -.02 | -.05 | -.10 | -.25 | -.50 | -1 | -2 | -5 | -20 | -75 | 75 | whole | |||
Layer | (cm) | Horz | Prep | (- - - - - - - - - - - - - - - - - - - - - - - - - - % of <2mm Mineral Soil - - - - - - - - - - - - - - - - - - - - - - - - - - -) | (- - - - - - - % of <75mm - - - - - -) | soil | |||||||||||||||
3A1a1a | 3A1a1a | 3A1a1a | 3A1a1a | 3A1a1a | 3A1a1a | 3A1a1a | 3A1a1a | 3A1a1a | 3A1a1a | 3A1a1a | 3A1a1a | 3A1a1a | 3B1 | 3B1 | 3B1 | ||||||
00P04021 | 0-6 | A1 | S | sil | 21.9 | 58.0 | 20.1 | 13.6 | 24.9 | 33.1 | 8.8 | 6.7 | 2.9 | 1.2 | 0.5 | 1 | -- | -- | 12 | 1 | |
00P04022 | 6-15 | A2 | S | cl | 28.1 | 45.2 | 26.7 | 18.8 | 20.1 | 25.1 | 10.7 | 8.5 | 4.8 | 1.5 | 1.2 | 2 | 2 | -- | 19 | 4 | |
00P04023 | 15-35 | Bt | S | cl | 32.4 | 39.8 | 27.8 | 19.2 | 22.7 | 17.1 | 11.1 | 9.6 | 5.0 | 1.5 | 0.6 | 1 | 1 | -- | 18 | 2 | |
00P04024 | 35-52 | Btk | S | cl | 34.6 | 39.4 | 26.0 | 10.3 | 8.0 | 25.5 | 13.9 | 10.0 | 9.3 | 4.2 | 1.7 | 0.8 | 2 | 2 | -- | 19 | 4 |
00P04025 | 52-91 | Bk | S | cl | 33.7 | 42.2 | 24.1 | 11.1 | 5.2 | 27.4 | 14.8 | 9.7 | 9.0 | 3.3 | 1.4 | 0.7 | 1 | 2 | -- | 17 | 3 |
00P04026 | 91-123 | BCk | S | cl | 30.7 | 42.9 | 26.4 | 8.1 | 1.8 | 28.0 | 14.9 | 11.6 | 8.7 | 4.2 | 1.3 | 0.6 | 3 | 2 | 3 | 22 | 8 |
00P04027 | 123-150 | C | S | cl | 29.9 | 43.8 | 26.3 | 11.1 | 0.7 | 27.7 | 16.1 | 11.1 | 8.6 | 4.1 | 1.7 | 0.8 | -- | -- | -- | 15 | -- |
*** Primary Characterization Data *** |
Pedon ID: S1999ND057001 | ( Mercer, North Dakota ) | Print Date: Nov 11 2024 8:38PM |
Sampled As | : | Williams | Fine-loamy, mixed, superactive, frigid Typic Argiustolls | ||
USDA-NRCS-NSSC-Soil Survey Laboratory | ; | Pedon No. 00P0598 |
Water Dispersible PSDA | -1- | -2- | -3- | -4- | -5- | -6- | -7- | -8- | -9- | -10- | -11- | -12- | |||
(- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Water Dispersible - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -) | |||||||||||||||
(- - - - - Total - - - - - -) | (- - Clay - - -) | (- - - - Silt - - - - -) | (- - - - - - - - - - - - Sand - - - - - - - - - - - -) | ||||||||||||
Clay | Silt | Sand | F | CO3 | F | C | VF | F | M | C | VC | ||||
< | .002 | .05 | < | < | .002 | .02 | .05 | .10 | .25 | .5 | 1 | ||||
Depth | .002 | -.05 | -2 | .0002 | .002 | -.02 | -.05 | -.10 | -.25 | -.50 | -1 | -2 | |||
Layer | (cm) | Horz | Prep | (- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - % of <2mm - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -) | |||||||||||
3A1a6a | 3A1a6a | 3A1a6a | 3A1a6a | 3A1a6a | 3A1a6a | 3A1a6a | 3A1a6a | 3A1a6a | 3A1a6a | ||||||
00P04021 | 0-6 | A1 | S | 5.2 | 63.0 | 31.8 | 28.2 | 34.8 | 13.8 | 10.1 | 5.5 | 1.6 | 0.8 |
Bulk Density & Moisture | -1- | -2- | -3- | -4- | -5- | -6- | -7- | -8- | -9- | -10- | -11- | -12- | -13- | -14- | |||
(Bulk Density) | Cole | (- - - - - - - - - - - Water Content - - - - - - - - - - -) | ( Air Dry-Oven Dry ) | WRD | Aggst | ||||||||||||
33 | Oven | Whole | 6 | 10 | 33 | 1500 | 1500 kPa | (- - - - Ratio - - - -) | Whole | Stabl | (- - Ratio/Clay - -) | ||||||
Depth | kPa | Dry | Soil | kPa | kPa | kPa | kPa | Moist | Corrected | Soil | 2-0.5mm | CEC7 | 1500 kPa | ||||
Layer | (cm) | Horz | Prep | (- - - g cm-3 - - -) | (- - - - - - - - - - - - pct of < 2mm - - - - - - - - - - - -) | cm3 cm-3 | % | ||||||||||
3C2a1a | 3D1 | 3F1a1a | 8D1 | 8D1 | |||||||||||||
00P04021 | 0-6 | A1 | S | 13.7 | 1.029 | 64 | 1.12 | 0.63 | |||||||||
00P04022 | 6-15 | A2 | S | 13.6 | 1.032 | 0.86 | 0.48 | ||||||||||
00P04023 | 15-35 | Bt | S | 14.1 | 1.036 | 0.76 | 0.44 | ||||||||||
00P04024 | 35-52 | Btk | S | 12.4 | 1.034 | 0.52 | 0.36 | ||||||||||
00P04025 | 52-91 | Bk | S | 12.3 | 1.035 | 0.52 | 0.36 | ||||||||||
00P04026 | 91-123 | BCk | S | 12.2 | 1.030 | 4 | 0.60 | 0.40 | |||||||||
00P04027 | 123-150 | C | S | 12.8 | 1.028 | 0.65 | 0.43 |
Carbon & Extractions | -1- | -2- | -3- | -4- | -5- | -6- | -7- | -8- | -9- | -10- | -11- | -12- | -13- | -14- | -15- | -16- | -17- | -18- | -19- | |||
(- - - - - Total - - - - -) | Est | OC | C/N | (- - - Dith-Cit Ext - - -) | (- - - - - - Ammonium Oxalate Extraction - - - - - -) | (- - - Na Pyro-Phosphate - - -) | ||||||||||||||||
Depth | C | N | S | OC | (WB) | Ratio | Fe | Al | Mn | Al+½Fe | ODOE | Fe | Al | Si | Mn | C | Fe | Al | Mn | |||
Layer | (cm) | Horz | Prep | (- - - - - - - - - - % of <2 mm - - - - - - - - - -) | (- - - - - - - - - - - - - - - - - - - % of < 2mm - - - - - - - - - - - - - - - - -) | mg kg-1 | (- - - - - - % of < 2mm - - - - -) | |||||||||||||||
6A2e | 6B4a | 6R3c | 6C2h | 6G7g | 6D2g | |||||||||||||||||
00P04021 | 0-6 | A1 | S | 3.73 | 0.40 | tr | 4 | 0.9 | 0.1 | tr | ||||||||||||
00P04022 | 6-15 | A2 | S | 2.01 | 0.24 | tr | 2 | 0.9 | 0.1 | tr | ||||||||||||
00P04023 | 15-35 | Bt | S | 1.29 | 0.16 | tr | 1 | 0.9 | 0.1 | tr | ||||||||||||
00P04024 | 35-52 | Btk | S | 3.33 | 0.12 | tr | 1 | 0.7 | 0.1 | tr | ||||||||||||
00P04025 | 52-91 | Bk | S | 2.34 | 0.07 | tr | tr | 0.7 | tr | tr | ||||||||||||
00P04026 | 91-123 | BCk | S | 1.75 | 0.05 | tr | tr | 0.8 | tr | tr | ||||||||||||
00P04027 | 123-150 | C | S | 1.68 | 0.05 | tr | tr | 0.8 | tr | tr |
*** Primary Characterization Data *** |
Pedon ID: S1999ND057001 | ( Mercer, North Dakota ) | Print Date: Nov 11 2024 8:38PM |
Sampled As | : | Williams | Fine-loamy, mixed, superactive, frigid Typic Argiustolls | ||
USDA-NRCS-NSSC-Soil Survey Laboratory | ; | Pedon No. 00P0598 |
CEC & Bases | -1- | -2- | -3- | -4- | -5- | -6- | -7- | -8- | -9- | -10- | -11- | -12- | -13- | -14- | |||
(- - - - - - NH4OAC Extractable Bases - - - - -) | CEC8 | CEC7 | ECEC | (- - - - Base - - - -) | |||||||||||||
Sum | Acid- | Extr | KCl | Sum | NH4 | Bases | Al | (- Saturation -) | |||||||||
Depth | Ca | Mg | Na | K | Bases | ity | Al | Mn | Cats | OAC | +Al | Sat | Sum | NH4OAC | |||
Layer | (cm) | Horz | Prep | (- - - - - - - - - - - - - - - - - cmol(+) kg-1 - - - - - - - - - - - - - - - - - - -) | mg kg-1 | (- - - - cmol(+) kg-1 - - -) | (- - - - - - - - % - - - - - - - -) | ||||||||||
6N2i | 6O2h | 6P2f | 6Q2f | 6H5a | 5A3a | 5A8b | 5C3 | 5C1 | |||||||||
00P04021 | 0-6 | A1 | S | 18.9* | 6.0 | 0.2 | 1.6 | 26.7 | 6.0 | 32.7 | 24.5 | 82 | 100 | ||||
00P04022 | 6-15 | A2 | S | 17.4* | 7.4 | 0.2 | 1.0 | 26.0 | 5.6 | 31.6 | 24.3 | 82 | 100 | ||||
00P04023 | 15-35 | Bt | S | 21.1* | 10.2 | 0.3 | 0.8 | 2.8 | 24.6 | 92 | 100 | ||||||
00P04024 | 35-52 | Btk | S | 51.9* | 11.2 | 0.2 | 0.6 | 18.0 | 100 | 100 | |||||||
00P04025 | 52-91 | Bk | S | 49.0* | 22.8 | 1.1 | 0.6 | 17.6 | 100 | 100 | |||||||
00P04026 | 91-123 | BCk | S | 36.0* | 24.5 | 2.8 | 0.2 | 18.5 | 100 | 100 | |||||||
00P04027 | 123-150 | C | S | 39.1* | 21.8 | 3.7 | 0.5 | 19.3 | 100 | 100 |
Salt | -1- | -2- | -3- | -4- | -5- | -6- | -7- | -8- | -9- | -10- | -11- | -12- | -13- | -14- | -15- | -16- | -17- | -18- | -19- | -20- | |||
(- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Water Extracted From Saturated Paste - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -) | 1:2 | ||||||||||||||||||||||
Total | Elec | Elec | Exch | ||||||||||||||||||||
Depth | Ca | Mg | Na | K | CO3 | HCO3 | F | Cl | PO4 | Br | OAC | SO4 | NO2 | NO3 | H2O | Salts | Cond | Cond | Na | SAR | |||
Layer | (cm) | Horz | Prep | (- - - - - mmol(+) L-1 - - - - -) | (- - - - - - - - - - - - - - - - - - - - - - mmol(-) L-1 - - - - - - - - - - - - - - - - - - - -) | (- - - - % - - - -) | (- - dS m-1 - -) | % | |||||||||||||||
6N1d | 6O1d | 6P1d | 6Q1d | 6I1b | 6J1b | 6U1d | 6K1f | 6L1f | 6W1d | 6M1f | 8A | 8D5 | 8A3a | 4F1a1a1 | 5E | ||||||||
00P04021 | 0-6 | A1 | S | 18.9 | 10.9 | 0.5 | 2.5 | -- | 1.4 | -- | 1.6 | 2.4 | 2.4 | 28.9 | 73.6 | 0.2 | 3.39 | 1.38 | 1 | tr | |||
00P04022 | 6-15 | A2 | S | 7.6 | 5.0 | 0.2 | 0.6 | -- | 1.8 | -- | 0.6 | 1.0 | 3.1 | 8.1 | 65.6 | 0.1 | 1.55 | 0.56 | 1 | tr | |||
00P04023 | 15-35 | Bt | S | 4.5 | 3.1 | 0.3 | 0.3 | -- | 3.9 | -- | 0.2 | 0.7 | 2.7 | 0.3 | 60.6 | tr | 0.84 | 0.40 | 1 | tr | |||
00P04024 | 35-52 | Btk | S | 3.2 | 2.7 | 0.4 | 0.3 | -- | 2.7 | tr | 0.4 | 1.0 | 1.3 | 0.7 | 61.5 | tr | 0.67 | 0.36 | 1 | tr | |||
00P04025 | 52-91 | Bk | S | 0.7 | 2.3 | 3.2 | 0.1 | -- | 4.5 | 0.1 | 0.4 | 0.8 | 0.1 | 0.1 | 64.0 | tr | 0.61 | 0.37 | 5 | 3 | |||
00P04026 | 91-123 | BCk | S | 0.5 | 1.4 | 7.1 | 0.3 | -- | 3.7 | tr | 0.7 | 4.3 | 0.1 | 0.1 | 67.7 | tr | 0.92 | 0.59 | 13 | 7 | |||
00P04027 | 123-150 | C | S | 2.5 | 14.0 | 20.7 | 0.5 | -- | 2.2 | 0.1 | 1.6 | 39.1 | tr | tr | 63.6 | 0.1 | 3.26 | 1.35 | 12 | 7 |
*** Primary Characterization Data *** |
Pedon ID: S1999ND057001 | ( Mercer, North Dakota ) | Print Date: Nov 11 2024 8:38PM |
Sampled As | : | Williams | Fine-loamy, mixed, superactive, frigid Typic Argiustolls | ||
USDA-NRCS-NSSC-Soil Survey Laboratory | ; | Pedon No. 00P0598 |
pH & Carbonates | -1- | -2- | -3- | -4- | -5- | -6- | -7- | -8- | -9- | -10- | -11- | |||
(- - - - - - - - - - - - - - - - - - pH - - - - - - - - - - - - - - - - -) | (- - Carbonate - -) | (- - Gypsum - - -) | ||||||||||||
CaCl2 | As CaCO3 | As CaSO4*2H2O | Resist | |||||||||||
Depth | 0.01M | H2O | Sat | <2mm | <20mm | <2mm | <20mm | ohms | ||||||
Layer | (cm) | Horz | Prep | KCl | 1:2 | 1:1 | Paste | Oxid | NaF | (- - - - - - - - - - - - % - - - - - - - - - - -) | cm-1 | |||
4C1a2a | 4C1a2a | 8C1b | 4E1a1a1a1 | 4E2a1a1a1 | ||||||||||
00P04021 | 0-6 | A1 | S | 5.7 | 5.8 | 5.7 | -- | |||||||
00P04022 | 6-15 | A2 | S | 6.2 | 6.5 | 6.3 | -- | |||||||
00P04023 | 15-35 | Bt | S | 7.2 | 7.7 | 7.2 | 1 | |||||||
00P04024 | 35-52 | Btk | S | 7.6 | 8.0 | 7.6 | 20 | |||||||
00P04025 | 52-91 | Bk | S | 8.1 | 8.5 | 8.1 | 17 | |||||||
00P04026 | 91-123 | BCk | S | 8.3 | 8.7 | 8.5 | 12 | -- | ||||||
00P04027 | 123-150 | C | S | 8.2 | 8.5 | 8.2 | 10 | -- |
Phosphorus | -1- | -2- | -3- | -4- | -5- | -6- | -7- | -8- | -9- | -10- | -11- | -12- | |||
(- - - - - - - - - - - - - - - - - - - - - - - Phosphorus - - - - - - - - - - - - - - - - - - - - -) | KCl | ||||||||||||||
Melanic | NZ | Acid | Anion Exch Resin | Bray | Bray | Olsen | H2O | Citric | Mehlich | Extr | |||||
Depth | Index | Oxal | Available | Capacity | 1 | 2 | Acid | III | NO3 | ||||||
Layer | (cm) | Horz | Prep | % | (- - - - - - - - - - - - - - - - - - - - - - - - - - - mg kg-1 - - - - - - - - - - - - - - - - - - - -) | ||||||||||
6S3e | |||||||||||||||
00P04021 | 0-6 | A1 | S | 18.0 |
*** Primary Characterization Data *** |
Pedon ID: S1999ND057001 | ( Mercer, North Dakota ) | Print Date: Nov 11 2024 8:38PM |
Sampled As | : | Williams | Fine-loamy, mixed, superactive, frigid Typic Argiustolls | ||
USDA-NRCS-NSSC-Soil Survey Laboratory | ; | Pedon No. 00P0598 |
Clay Mineralogy (<.002 mm) | -1- | -2- | -3- | -4- | -5- | -6- | -7- | -8- | -9- | -10- | -11- | -12- | -13- | -14- | -15- | -16- | -17- | -18- | |||
X-Ray | Thermal | Elemental | EGME | Inter | |||||||||||||||||
SiO2 | Al2O3 | Fe2O3 | MgO | CaO | K2O | Na2O | Retn | preta | |||||||||||||
Depth | Fract | 7A2i | tion | ||||||||||||||||||
Layer | (cm) | Horz | ion | ( - - - - - - - - - peak size - - - - - - - - - - ) | (- - - - - - - - - % - - - - - - - - - -) | (- - - - - - - - - - - - - - - - - - - - - % - - - - - - - - - - - - - - - - - - - - -) | mg g-1 | ||||||||||||||
00P04023 | 15.0-35.0 | Bt | tcly | MT 4 | KK 3 | VR 2 | MI 2 | QZ 1 | |||||||||||||
00P04024 | 35.0-52.0 | Btk | tcly | MT 4 | KK 2 | MI 2 | VR 2 | CA 1 | |||||||||||||
QZ 1 |
FRACTION INTERPRETATION: | ||||
tcly - Total Clay <0.002 mm |
MINERAL INTERPRETATION: | ||||
CA Calcite | KK Kaolinite | MI Mica | MT Montmorillonite | QZ Quartz |
VR Vermiculite |
RELATIVE PEAK SIZE: | 5 Very Large | 4 Large | 3 Medium | 2 Small | 1 Very Small | 6 No Peaks |
*** Primary Characterization Data *** |
Pedon ID: S1999ND057001 | ( Mercer, North Dakota ) | Print Date: Nov 11 2024 8:38PM |
Sampled As | : | Williams | Fine-loamy, mixed, superactive, frigid Typic Argiustolls | ||
USDA-NRCS-NSSC-Soil Survey Laboratory | ; | Pedon No. 00P0598 |
Sand - Silt Mineralogy (2.0-0.002 mm) | -1- | -2- | -3- | -4- | -5- | -6- | -7- | -8- | -9- | -10- | -11- | -12- | -13- | -14- | -15- | -16- | -17- | -18- | |||
X-Ray | Thermal | Optical | EGME | Inter | |||||||||||||||||
Tot Re | Grain Count | Retn | preta | ||||||||||||||||||
Depth | Fract | 7B1a2 | tion | ||||||||||||||||||
Layer | (cm) | Horz | ion | ( - - - - - - - - peak size - - - - - - - - - ) | (- - - - - - - - % - - - - - - - - - -) | (- - - - - - - - - - - - - - - - - - - - % - - - - - - - - - - - - - - - - - -) | mg g-1 | ||||||||||||||
00P04023 | 15.0-35.0 | Bt | csi | 53 | QZ 44 | FK 25 | MS 9 | CD 7 | AR 5 | BT 3 | |||||||||||
HN 2 | FP 2 | FE 1 | GN 1 | PR tr | OP tr | ||||||||||||||||
BY tr | TM tr | CL tr | CA tr | PO tr | ZE tr | ||||||||||||||||
ZR tr | EP tr | MZ tr | CT tr | SP tr | |||||||||||||||||
00P04024 | 35.0-52.0 | Btk | csi | 39 | QZ 35 | CA 30 | FK 16 | MS 4 | CB 3 | BT 3 | |||||||||||
AR 2 | FP 2 | CD 2 | FE 2 | HN 1 | GN tr | ||||||||||||||||
OP tr | BY tr | PR tr | ZR tr | TM tr | AP tr | ||||||||||||||||
ZE tr | FF tr | GS tr | EP tr | SP tr |
FRACTION INTERPRETATION: | ||||
csi - Coarse Silt 0.02-0.05 mm |
MINERAL INTERPRETATION: | ||||
AP Apatite | AR Weatherable Aggregates | BT Biotite | BY Beryl | CA Calcite |
CB Carbonate Aggregates | CD Chert (Chalcedony | CL Chlorite | CT Cassiterite | EP Epidote |
FE Iron Oxides (Goethite | FF Foraminifera | FK Potassium Feldspar | FP Plagioclase Feldspar | GN Garnet |
GS Glass | HN Hornblende | MS Muscovite | MZ Monazite | OP Opaques |
*** Primary Characterization Data *** |
Pedon ID: S1999ND057001 | ( Mercer, North Dakota ) | Print Date: Nov 11 2024 8:38PM |
Sampled As | : | Williams | Fine-loamy, mixed, superactive, frigid Typic Argiustolls | ||
USDA-NRCS-NSSC-Soil Survey Laboratory | ; | Pedon No. 00P0598 |
MINERAL INTERPRETATION: | ||||
PO Plant Opal | PR Pyroxene | QZ Quartz | SP Sphene | TM Tourmaline |
ZE Zeolite | ZR Zircon |