IDENTIFIERS

Current Taxon Name (Soil Name): Riddles

OSD

Series Extent

User Site ID: S1971MI161001

User Pedon ID: S1971MI161001

Lab Information:

Certified Lab Pedon Description - yes

Lab Source ID - SSL

Lab Pedon # - 40A1912

User Project ID: 2024GRR009

Project Name: EVAL - MLRA 98 - Riddles sandy loam, 1 to 6 percent slopes

Print Date: 3/2/2025

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: 42.3588982

Std. Longitude: -83.9821167

Datum: WGS84

Township: 1S

Range: 4E

Section: 29

PLSS Details: NE 1/4 of SW 1/4 of SE 1/4

Location Description: Dexter Township

Map Unit: RdC—Riddles sandy loam, 6 to 12 percent slopes

Country: US—United States

State: Michigan

County: MI161—Washtenaw

MLRA: 98—Southern Michigan and Northern Indiana Drift Plains

Regional Office: NE—Northeast

MLRA Soil Survey Area: NE-GRP—Grand Rapids, Michigan

Non-MLRA Soil Survey Area: MI161—Washtenaw County, Michigan

7.5 Minute USGS Quad: 42083-C8—Dexter, Michigan

PEDON

Describers Name: H.R. Sinclair, Jr. and N. Stroesenreuther

Current Taxonomic Class: Fine-loamy, mixed, active, mesic Typic Hapludalfs

Current Taxon Kind: series

Pedon Type: classifies to current taxon name, full description

Pedon Record Orgin: Converted from PDP 3.x

Pedon #: 1

Correlated Information:

Soil Name - Riddles

PSC - 20 to 70 cm.

Classificaton Date - 4/1/2024

Classifier - Sydney Lance

Soil Taxonomic Edition - thirteenth edition

Moisture Class - udic

Moisture Subclass - typic

Sampled As Information:

Soil Name - Riddles

Taxonomic Class - Fine-loamy, mixed Glossoboric Hapludalfs

PSC - 20 to 70 cm.

Classificaton Date - 10/10/1971

Moisture Class - udic

Dynamic Soil Properties:

Erosion Class - 1

Pedoderm Loose Cover Indicator - no

Hydric: no

Certification Status: certified

QC Status: level 1

SITE

Parent Material: loamy till

Landscape: ice-margin complex

Geomorphic Component Hills: interfluve

Hill Slope Profile: summit

Slope Complexity: simple

Slope Shape Across: linear

Slope Shape Down: linear

Drainage Pattern: dendritic

Runoff: low

Ksat Class Upper: moderately high

Drainage Class: well

Flooding: none flooding

Ponding: none ponding

Surface Fragments:

Benchmark Soil?: yes

VEGETATION

Ecological Sites. (Click Ecological Site ID For Link to EDIT.)
Ecological Site ID	Ecological Site Name	Correlation Data	Classifier
F098XA015MI	Dry Loamy Drift Plains	Apr 3 2024	Sydney Lance

SITE OBSERVATION

Observation Date: 10/10/1971 (actual site observation date)

Data Collector: soil survey staff

Surface Cover Properties:

Site Obs. Cover Kind 1 - crop cover

Pedoderm Loose Cover Indicator - no

Drained? - no

Bedded Soil? - no

Forest Plantation? - no

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
ochric epipedon argillic horizon free carbonates	0—15 20—112 112—165	—15— —92— —53—

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
5	—	—	281.6	—	135	898	—	170	9.6	21.5	-3.2	—	—	—	—	—	200230	Ann Arbor U Of Mich	COOP

Ap—0 to 15 centimeters (0.0 to 5.9 inches); brown (10YR 4/3) and dark brown (10YR 3/3) crushed, pale brown (10YR 6/3), dry; fine sandy loam; coarse subangular blocky parts to moderate fine and medium granular structure; friable; 21.0 fine roots; 1 percent by volume nonflat subrounded indurated 75-162-250 millimeter mixed fragments and 5 percent by volume nonflat subrounded indurated 2-39-75 millimeter mixed fragments; slightly acid, pH 6.2, pH meter; abrupt smooth boundary. Lab sample # 40A15215

E/B (E)—15 to 20 centimeters (5.9 to 7.9 inches); yellowish brown (10YR 5/4), 85 percent very pale brown (10YR 8/2), dry; fine sandy loam; fragments; slightly acid, pH 6.5, pH meter; clear wavy boundary. Lab sample # 40A15216. horizon was originally A&B

E/B (B)—15 to 20 centimeters (5.9 to 7.9 inches); yellowish brown (10YR 5/6) fine sandy loam; moderate fine subangular blocky structure; friable; 3.0 fine roots; 1 percent by volume nonflat subrounded indurated 75-162-250 millimeter mixed fragments and 5 percent by volume nonflat subrounded indurated 2-39-75 millimeter mixed fragments; slightly acid, pH 6.5, pH meter. Lab sample # 40A15216

Bt/E (E)—20 to 30 centimeters (7.9 to 11.8 inches); yellowish brown (10YR 5/4), light gray (10YR 7/2), dry; loam; fragments; slightly acid, pH 6.3, pH meter; clear wavy boundary. Lab sample # 40A15217. horizon was originally B&A

Bt/E (Bt)—20 to 30 centimeters (7.9 to 11.8 inches); yellowish brown (10YR 5/6) loam; moderate fine subangular blocky structure; friable; 0.5 fine roots; 75 percent brown (7.5YR 4/4) clay films on all faces of peds; 1 percent by volume nonflat subrounded indurated 75-162-250 millimeter mixed fragments observed by visual inspection method and 5 percent by volume nonflat subrounded indurated 2-39-75 millimeter mixed fragments observed by visual inspection method; slightly acid, pH 6.3, pH meter. Lab sample # 40A15217

Bt1—30 to 56 centimeters (11.8 to 22.0 inches); yellowish brown (10YR 5/6) and brown (7.5YR 4/4) crushed sandy clay loam; moderate very coarse prismatic parts to moderate very fine and fine subangular blocky structure; 0.5 fine roots; skeletans on faces of peds and 75 percent brown (7.5YR 5/4) clay films on all faces of peds; 1 percent by volume nonflat subrounded indurated 75-162-250 millimeter mixed fragments and 5 percent by volume nonflat subrounded indurated 2-39-75 millimeter mixed fragments; strongly acid, pH 5.4, pH meter; gradual wavy boundary. Lab sample # 40A15218

Bt2—56 to 81 centimeters (22.0 to 31.9 inches); strong brown (7.5YR 5/6) and brown (7.5YR 4/4) crushed fine sandy loam; weak very coarse prismatic parts to moderate fine and medium subangular blocky parts to moderate coarse subangular blocky structure; friable; 0.5 fine roots; 75 percent brown (7.5YR 4/4) clay films on all faces of peds; 1 percent by volume nonflat subrounded indurated 75-162-250 millimeter mixed fragments and 5 percent by volume nonflat subrounded indurated 2-39-75 millimeter mixed fragments; strongly acid, pH 5.4, pH meter; gradual wavy boundary. Lab sample # 40A15219

BC—81 to 112 centimeters (31.9 to 44.1 inches); yellowish brown (10YR 5/4) and brown (7.5YR 4/4) crushed fine sandy loam; moderate fine and medium subangular blocky parts to moderate coarse and very coarse subangular blocky structure; friable; 0.5 fine roots; 75 percent brown (7.5YR 4/3) clay films on all faces of peds; 1 percent by volume nonflat subrounded indurated 75-162-250 millimeter mixed fragments and 5 percent by volume nonflat subrounded indurated 2-39-75 millimeter mixed fragments; neutral, pH 7.1, pH meter; clear wavy boundary. Lab sample # 40A15220. 40A15221

C1—112 to 150 centimeters (44.1 to 59.1 inches); yellowish brown (10YR 5/4) sandy loam; massive parts to weak medium platy; friable; 0.5 fine roots; 1 percent by volume nonflat subrounded indurated 75-162-250 millimeter mixed fragments and 5 percent by volume nonflat subrounded indurated 2-39-75 millimeter mixed fragments; slight effervescence, by hcl, unspecified; moderately alkaline, pH 8.1, pH meter; gradual wavy boundary. Lab sample # 40A15222

C2—150 to 165 centimeters (59.1 to 65.0 inches); yellowish brown (10YR 5/4) fine sandy loam; massive parts to weak medium platy; friable; 0.5 fine roots; 1 percent by volume nonflat subrounded indurated 2-39-75 millimeter mixed fragments and 7 percent by volume nonflat subrounded indurated 2-39-75 millimeter mixed fragments; slight effervescence, by hcl, unspecified; moderately alkaline, pH 8.2, pH meter. Lab sample # 40A15223