Soil Data Explorer - PEAKS

Official Series Description

Lab Data Summary

Aggregate lab data for the PEAKS soil series. This aggregation is based on all pedons with a current taxon name of PEAKS, and applied along 1-cm thick depth slices. Solid lines are the slice-wise median, bounded on either side by the interval defined by the slice-wise 5th and 95th percentiles. The median is the value that splits the data in half. Five percent of the data are less than the 5th percentile, and five percent of the data are greater than the 95th percentile. Values along the right hand side y-axis describe the proportion of pedon data that contribute to aggregate values at this depth. For example, a value of "90%" at 25cm means that 90% of the pedons correlated to PEAKS were used in the calculation. Source: KSSL snapshot (updated 2020-03-13). Methods used to assemble the KSSL snapshot used by SoilWeb / SDE

Pedons used in the lab summary:

MLRA	Lab ID	Pedon ID	Taxonname	CI	NSSL / NASIS Reports	Link To SoilWeb GMap
130B	93P0264	91NC171001	Peaks	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	36.498333,-80.9230576

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the PEAKS soil series. Monthly precipitation (PPT) and potential evapotranspiration (PET) have been estimated from the 50th percentile of gridded values (PRISM 1981-2010) overlapping with the extent of SSURGO map units containing each series as a major component. Monthly PET values were estimated using the method of Thornthwaite (1948). These (and other) climatic parameters are calculated with each SSURGO refresh and provided by the fetchOSD function of the soilDB package. Representative water storage values (“AWC” in the figures) were derived from SSURGO by taking the 50th percentile of profile-total water storage (sum[awc_r * horizon thickness]) for each soil series. Note that this representation of “water storage” is based on the average ability of most plants to extract soil water between 15 bar (“permanent wilting point”) and 1/3 bar (“field capacity”) matric potential. Soil moisture state can be roughly interpreted as “dry” when storage is depleted, “moist” when storage is between 0mm and AWC, and “wet” when there is a surplus. Clearly there are a lot of assumptions baked into this kind of monthly water balance. This is still a work in progress.

Sibling Summary

Siblings are those soil series that occur together in map units, in this case with the PEAKS series. Sketches are arranged according to their subgroup-level taxonomic structure. Source: SSURGO snapshot (updated 2024-02-21), parsed OSD records (updated 2023-10-02) and snapshot of SC database (updated 2023-10-02).

Select annual climate data summaries for the PEAKS series and siblings. Series are sorted according to hierarchical clustering of median values. Source: SSURGO map unit geometry and 1981-2010, 800m PRISM data (updated 2023-10-09).

Geomorphic description summaries for the PEAKS series and siblings. Series are sorted according to hierarchical clustering of proportions and relative hydrologic position within an idealized landform (e.g. top to bottom). Most soil series (SSURGO components) are associated with a hillslope position and one or more landform-specific positions: hills, mountain slopes, terraces, and/or flats. Proportions can be interpreted as an aggregate representation of geomorphic membership. The values printed to the left (number of component records) and right (Shannon entropy) of stacked bars can be used to judge the reliability of trends. Small Shannon entropy values suggest relatively consistent geomorphic association, while larger values suggest lack thereof. Source: SSURGO component records (updated 2023-10-04).

There are insufficient data to create the 3D terrace figure.

There are insufficient data to create the 3D flats position figure.

Competing Series

Soil series competing with PEAKS share the same family level classification in Soil Taxonomy. Source: parsed OSD records (updated 2023-10-02) and snapshot of the SC database (updated 2023-10-02).

Select annual climate data summaries for the PEAKS series and competing. Series are sorted according to hierarchical clustering of median values. Source: SSURGO map unit geometry and 1981-2010, 800m PRISM data (updated 2023-10-09).

Geomorphic description summaries for the PEAKS series and competing. Series are sorted according to hierarchical clustering of proportions and relative hydrologic position within an idealized landform (e.g. top to bottom). Proportions can be interpreted as an aggregate representation of geomorphic membership. Most soil series (SSURGO components) are associated with a hillslope position and one or more landform-specific positions: hills, mountain slopes, terraces, and/or flats. The values printed to the left (number of component records) and right (Shannon entropy) of stacked bars can be used to judge the reliability of trends. Shannon entropy values close to 0 represent soil series with relatively consistent geomorphic association, while values close to 1 suggest lack thereof. Source: SSURGO component records (updated 2023-10-04).

There are insufficient data to create the 3D flats position figure.

Soil series sharing subgroup-level classification with PEAKS, arranged according to family differentiae. Hovering over a series name will print full classification and a small sketch from the OSD. Source: snapshot of SC database (updated 2023-10-02).

Block Diagrams

Click a link below to display the diagram. Note that these diagrams may be from multiple survey areas.

1. NC-2010-09-28-12 | Surry County - 2007

   Relationship of soils, landscape, and geology in the Cowee-Evard general soil map unit and the Chestnut-Peaks general soil map unit (Soil Survey of Surry County, North Carolina; 2007).

2. NC-2010-09-28-13 | Surry County - 2007

   Relationship of soils, landscape, and geology of Pilot Mountain (Soil Survey of Surry County, North Carolina; 2007).

Map Units

Map units containing PEAKS as a major component. Limited to 250 records.

Map Unit Name	Symbol	Map Unit Area (ac)	Map Unit Key	National Map Unit Symbol	Soil Survey Area	Publication Date	Map Scale
Chestnut-Peaks-Tuckasegee complex, 45 to 90 percent slopes, very rocky	CfF	4388	1427568	1jxhl	nc171	2005	1:24000
Chestnut-Peaks complex, 25 to 45 percent slopes, very rocky	CeE	1221	1427565	1jxhh	nc171	2005	1:24000
Chestnut-Peaks complex, 8 to 25 percent slopes, very rocky	CeD	818	127510	48p7	nc171	2005	1:24000
Cleveland-Rock outcrop-Peaks complex, windswept, 45 to 90 percent slopes, extremely bouldery	CkF	627	1427573	1jxhr	nc171	2005	1:24000
Cleveland-Rock outcrop-Peaks complex, windswept, 10 to 45 percent slopes, very bouldery	ChE	167	1427572	1jxhq	nc171	2005	1:24000
Edneytown-Peaks complex, 35 to 55 percent slopes, extremely stony	17E	26313	136719	4l89	va009	2004	1:24000
Peaks-Rock outcrop complex, 55 to 75 percent slopes	26F	7911	136744	4l93	va009	2004	1:24000
Edneytown-Peaks complex, 15 to 35 percent slopes, extremely stony	17D	7500	136718	4l88	va009	2004	1:24000
Peaks-Rock outcrop complex, 35 to 55 percent slopes	26E	4467	136620	4l53	va009	2004	1:24000
Edneytown-Peaks complex, 55 to 75 percent slopes, extremely stony	17F	3768	136720	4l8b	va009	2004	1:24000
Edneytown-Peaks complex, 7 to 15 percent slopes, extremely stony	17C	2164	136717	4l87	va009	2004	1:24000
Peaks-Rock outcrop complex, 15 to 35 percent slopes	26D	1147	136619	4l52	va009	2004	1:24000
Peaks-Rock outcrop complex, 7 to 15 percent slopes	26C	483	136618	4l51	va009	2004	1:24000
Edneytown-Peaks complex, 2 to 7 percent slopes, very stony	17B	25	136716	4l86	va009	2004	1:24000
Peaks gravelly sandy loam, 60 to 80 percent slopes, very stony	43F	812	519106	kf5c	va023	1990	1:20000
Peaks gravelly sandy loam, 30 to 60 percent slopes, very stony	43E	323	519105	kf5b	va023	1990	1:20000
Peaks-Rock outcrop complex, 25 to 90 percent slopes, extremely stony	37F	6226	1914800	228hr	va063	2007	1:24000
Peaks very gravelly loam, 35 to 55 percent slopes, very stony	36E	5964	1914798	228hp	va063	2007	1:24000
Peaks very gravelly loam, 35 to 55 percent slopes	35E	4299	1914796	228hm	va063	2007	1:24000
Peaks very gravelly loam, 55 to 90 percent slopes, very stony	36F	3182	1914799	228hq	va063	2007	1:24000
Peaks very gravelly loam, 8 to 35 percent slopes, very stony	36D	2215	1914797	228hn	va063	2007	1:24000
Peaks very gravelly loam, 8 to 35 percent slopes	35D	1269	1914795	228hl	va063	2007	1:24000
Peaks-Ashe-Edneyville complex, 25 to 45 percent slopes, very stony	33E	7504	582035	mjnb	va067	2004	1:24000
Peaks-Ashe-Edneyville complex, 45 to 95 percent slopes, very stony	33F	5668	582037	mjnd	va067	2004	1:24000
Ashe-Peaks-Edneyville complex, 15 to 25 percent slopes, very stony	2D	979	581931	mjjz	va067	2004	1:24000
Ashe-Edneyville-Peaks complex, 8 to 15 percent slopes, very stony	1C	541	581929	mjjx	va067	2004	1:24000
Peaks very gravelly loam, 35 to 55 percent slopes, extremely stony	43E	15241	516808	kbs7	va077	2006	1:24000
Peaks very gravelly loam, 35 to 55 percent slopes	42E	12340	516804	kbs3	va077	2006	1:24000
Peaks very gravelly loam, 55 to 80 percent slopes, extremely stony	43F	9992	1670586	1t2cw	va077	2006	1:24000
Peaks very gravelly loam, 15 to 35 percent slopes	42D	4739	516803	kbs2	va077	2006	1:24000
Peaks very gravelly loam, 15 to 35 percent slopes, extremely stony	43D	3718	1670584	1t2ct	va077	2006	1:24000
Rock outcrop-Peaks complex, 25 to 80 percent slopes	50F	1550	516812	kbsc	va077	2006	1:24000
Peaks very gravelly loam, 7 to 15 percent slopes	42C	635	1670580	1t2cp	va077	2006	1:24000
Peaks very gravelly loam, 7 to 15 percent slopes, extremely stony	43C	245	1670583	1t2cs	va077	2006	1:24000
Chestnut-Peaks complex, 25 to 45 percent slopes, very rocky	10E	154	1670507	1t29b	va077	2006	1:24000
Chestnut-Peaks-Tuckasegee complex, 45 to 90 percent slopes, very rocky	11F	93	1670508	1t29c	va077	2006	1:24000
Chestnut-Peaks complex, 8 to 25 percent slopes, very rocky	10D	48	1670506	1t299	va077	2006	1:24000
Edneytown-Peaks complex, 35 to 55 percent slopes, extremely stony	14E	45489	136848	4ldg	va125	1992	1:24000
Peaks-Rock outcrop complex, 35 to 55 percent slopes	36E	7228	137060	4lm9	va125	1992	1:24000
Peaks-Rock outcrop complex, 55 to 75 percent slopes	36F	7154	137061	4lmb	va125	1992	1:24000
Edneytown-Peaks complex, 15 to 35 percent slopes, extremely stony	14D	6177	136846	4ldd	va125	1992	1:24000
Edneytown-Peaks complex, 7 to 15 percent slopes, extremely stony	14C	2273	136844	4ldb	va125	1992	1:24000
Peaks-Rock outcrop complex, 15 to 35 percent slopes	36D	726	137059	4lm8	va125	1992	1:24000
Edneytown-Peaks complex, 55 to 75 percent slopes, extremely stony	14F	238	136849	4ldh	va125	1992	1:24000
Peaks-Edneytown complex, 35 to 55 percent slopes, extremely stony	38E	4062	517263	kc7x	va139	1995	1:20000
Peaks-Edneytown complex, 15 to 35 percent slopes, extremely stony	38D	1772	517262	kc7w	va139	1995	1:20000
Peaks-Edneytown complex, 55 to 70 percent slopes, extremely stony	38F	1213	517264	kc7y	va139	1995	1:20000
Peaks-Rock outcrop complex, 55 to 70 percent slopes, extremely stony	39F	550	517268	kc82	va139	1995	1:20000
Peaks-Rock outcrop complex, 45 to 90 percent slopes, very stony	37F	5473	2108672	28s7p	va141	2008	1:24000
Peaks-Edneyville complex, 25 to 45 percent slopes, very rocky	36E	1770	2108671	28s7n	va141	2008	1:24000
Peaks-Edneyville complex, 15 to 25 percent slopes, very rocky	36D	89	2108670	28s7m	va141	2008	1:24000
Peaks gravelly loam, 60 to 75 percent slopes, very stony	34F	5075	520283	kgdb	va161	1990	1:24000
Peaks gravelly loam, 35 to 60 percent slopes, very stony	34E	2072	520282	kgd9	va161	1990	1:24000
Peaks-Edneytown complex, 35 to 70 percent slopes, very rocky	50F	4081	2514836	2qdcj	va163	2010	1:24000
Edneytown-Peaks complex, 35 to 70 percent slopes, very stony	20F	3596	2514785	2qd9s	va163	2010	1:24000
Edneytown-Peaks complex, 15 to 35 percent slopes, very stony	20E	1933	2514784	2qd9r	va163	2010	1:24000
Edneytown-Peaks complex, 3 to 15 percent slopes, very stony	20C	313	2514783	2qd9q	va163	2010	1:24000
Peaks-Edneytown complex, 15 to 35 percent slopes, very rocky	50E	292	2514835	2qdch	va163	2010	1:24000
Peaks gravelly sandy loam, 35 to 60 percent slopes, extremely stony	72E	3285	2525263	2qm1y	va606		1:24000
Peaks gravelly sandy loam, 60 to 80 percents slopes, very stony	54F	1800	2525262	2qm1x	va606		1:24000
Peaks gravelly sandy loam, 35 to 60 percent slopes	54E	1411	2525261	2qm1w	va606		1:24000
Peaks gravelly sandy loam, 15 to 35 percent slopes	54D	527	2525260	2qm1v	va606		1:24000
Peaks-Rock outcrop complex, 25 to 90 percent slopes, extremely stony	21G	1353	3174065	2z3f5	va850		1:24000
Peaks, thick surface-Rock outcrop complex, 25 to 90 percent slopes, extremely stony	20G	439	3086814	2yn80	va850		1:24000
Rock outcrop-Peaks, thick surface complex, 25 to 80 percent slopes	26F	202	3086815	2yn81	va850		1:24000
Peaks very gravelly loam, 35 to 55 percent slopes, extremely stony	18F	162	3174060	2z3f0	va850		1:24000
Peaks very gravelly loam, thick surface, 35 to 55 percent slopes, extremely stony	19F	85	3174062	2z3f2	va850		1:24000
Peaks very gravelly loam, 15 to 35 percent slopes, extremely stony	18E	67	3174059	2z3dz	va850		1:24000
Peaks very gravelly loam, thick surface, 15 to 35 percent slopes, extremely stony	19E	23	3174061	2z3f1	va850		1:24000

Map of Series Extent

Approximate geographic distribution of the PEAKS soil series. To learn more about how this distribution was mapped, or to compare this soil series extent to others, use the Series Extent Explorer (SEE) application. Source: generalization of SSURGO geometry (updated 2023-10-04).