| OBJECTID | MapUnit | Name | FullName | Age | Description | HierarchyKey | ParagraphStyle | Label | Symbol | AreaFillRGB | AreaFillPatternDescription | DescriptionSourceID | GeoMaterial | GeoMaterialConfidence | DescriptionOfMapUnits_ID |
|---|
| 1 | None | Quaternary | None | None | None | 1 | DMU-Heading1 | None | None | None | None | OF0361 | None | None | DMU01 |
| 2 | None | Holocene | None | None | None | 1-1 | DMU-Heading2 | None | None | None | None | OF0361 | None | None | DMU02 |
| 3 | Qal | Alluvium | Alluvium | Holocene | Sand, yellow- to brownish-white in color, fine- to coarse-grained, subrounded to rounded, predominately quartzose, silty, clayey; humus lenses common. Streams on clay subcrop will exhibit shallow, wide alluvial plains while streams on sand subcrop tend to incise creating steep valleys with narrow alluvial plains, silicified wood common. Thickness approximately 50 feet along larger streams, thinning up tributaries. | 1-1-1 | DMU Unit 1 | Qal | Qal | 255,255,179 | None | OF0361 | Alluvial sediment, mostly fine-grained | Medium | DMU03 |
| 4 | None | Pleistocene | None | None | None | 1-2 | DMU-Heading2 | None | None | None | None | OF0361 | None | None | DMU04 |
| 5 | Qtl | Stream Terrace | Stream Terrace | Pleistocene | Fluvial deposits associated with base elevation change with the incision of the Pearl River during the Pleistocene epoch just west of French's Store; Sand, yellow- to brownish-white in color, fine- to coarse-grained, subrounded to rounded, predominately quartzose, locally graveliferous, silty to clayey; humus lenses common. Silicified wood may be common. | 1-2-1 | DMU Unit 1 | Qtl | Qtl | None | None | OF0361 | Alluvial sediment, mostly fine-grained | Medium | DMU05 |
| 7 | None | Tertiary | None | None | None | 2 | DMU-Heading1 | None | None | None | None | OF0361 | None | None | DMU06 |
| 8 | None | Pliocene | None | None | None | 2-1 | DMU-Heading2 | None | None | None | None | OF0361 | None | None | DMU07 |
| 9 | Tmt | Magee Terrace | Magee Terrace | Pliocene | Generally fining-upward sequence of fluvial siliciclastic deposits attributed to courses of the Plio-Pleistocene ancestral Tennessee–Ohio River system. Sand is yellow, orange, purple, red, and pink; fine to coarse grained; predominantly quartzose; cross bedded to massive. Graveliferous, containing pea to cobble size clasts typically not exceeding lengths of 3 in; clasts composed chiefly of chert with lesser amounts of quartz. Clay is kaolinitic, pink to white and occurs as discontinuous lenses and as basal rip up clasts. Relic floodplain silts and clays are preserved above approximately 550 ft MSL. The base of the unit is unconformable at roughly 400 ft MSL. Conglomeritic ironstone is commonly developed at the contact with the underlying Catahoula Formation. | 2-1-1 | DMU Unit 1 | Tmt | Tmt | 255,255,0 | None | OF0361 | Sand and gravel of unspecified origin | Medium | DMU08 |
| 10 | None | Oligocene | None | None | None | 2-2 | DMU-Heading2 | None | None | None | None | OF0361 | None | None | DMU09 |
| 11 | None | Grand Gulf Group | None | None | None | 2-2-1 | DMU-Heading3 | None | None | None | None | OF0361 | None | None | DMU10 |
| 12 | Tca | Catahoula Formation | Catahoula Formation | Oligocene | Deltaic to marine sands, silts, clays, sandstone, and sparse gravel. Sand is gray, pale yellow to white; fine to coarse grained; cross bedded to massive. Contains rare thinly bedded pea gravel layers. Gravels consist of highly polished black chert and milky quartz, ranging from subangular to well rounded. Sand is commonly indurated near the surface to sandstone. Predominantly quartzose with lesser amounts of chert, metaquartzite, mica, and heavy minerals; slightly glauconitic in places. Silicified wood and fossil palm fragments are common. Clay is green, gray, and brown; weathers white to brown in color; silty to sandy. Lignite is common in basal clay intervals. Unit is fossiliferous in part, particularly bioturbated in the lower beds and commonly containing leaf fossils in the upper beds. The Catahoula Formation unconformably overlies and locally incises into the underlying Bucatunna Formation. Total thickness of the formation not achieved on this map. | 2-2-1-1 | DMU Unit 1 | Tca | Tca | 252,89,102 | None | OF0361 | Sandstone and mudstone | Medium | DMU11 |
| 13 | None | Oligocene | None | None | None | 2-3 | DMU-Heading2 | None | None | None | None | OF0361 | None | None | DMU12 |
| 14 | None | Vicksburg Group | None | None | None | 2-3-1 | DMU-Heading3 | None | None | None | None | OF0361 | None | None | DMU13 |
| 15 | Tbu | Bucatunna Formation | Bucatunna Formation | Oligocene | Only divided out in cross section | 2-3-1-1 | DMU Unit 1 | Tbu | Tbu | 178,178,178 | None | OF0361 | Mudstone | High | DMU14 |
| 16 | Tv | Vicksburg Limestone | Vicksburg Limestone | Oligocene | Includes the undifferentiated successive marine units, listed in descending stratigraphic order: Bucatunna Formation, Byram Formation, Glendon Formation, Marianna Formation; and Mint Spring Formation. The Bucatunna Formation consists of carbonaceous clays dark brown to gray in color, silty to fine sandy, averaging about 45 ft in thickness. The Byram Formation is composed of sandy to clayey marl, glauconitic and fossiliferous, with a thickness of up to approximately 12 ft. The Glendon Formation consists of semi crystalline limestone interbedded with softer clayey marls and represents the marine highstand of the early Oligocene Vicksburg sequence. The underlying Marianna consists of soft clay marls. Collectively the Glendon-Marianna section reaches a maximum thickness of about 30 ft in the mapping area; The Mint Spring Formation consists of gray to green colored glauconitic and fossiliferous marly quartz sand. The Vicksburg Group is biostratigraphically characterized by the presence of the mollusk Pecten byramensis and the large benthic foraminifera Lepidocyclina sp. The Vicksburg Group unconformably overlies the Forest Hill Formation. | 2-3-1-2 | DMU Unit 1 | Tv | Tv | 168,0,0 | None | OF0361 | Mostly carbonate rock | High | DMU15 |
| 17 | Tfh | Forest Hill Formation | Forest Hill Formation | Oligocene | Deltaic sands, silts, and clays. Sand is fine-grained, silty, and quartzose; clay is carbonaceous and laminated, with lignite seams and silicified wood common. Carbonized plant fossils occur along fissile partings in clay intervals. The Forest Hill Formation unconformably overlies and commonly incises into the underlying Yazoo Formation and represents the lowermost member of the Vicksburg Group, distinguished from overlying units by its terrestrial to deltaic depositional setting. Approximate thickness is 80 ft in the mapping area. | 2-3-1-3 | DMU Unit 1 | Tfh | Tfh | 191,99,0 | None | OF0361 | Sandstone and mudstone | Medium | DMU16 |
| 18 | None | Eocene | None | None | None | 2-4 | DMU-Heading2 | None | None | None | None | OF0361 | None | None | DMU17 |
| 19 | None | Jackson Group | None | None | None | 2-4-1 | DMU-Heading3 | None | None | None | None | OF0361 | None | None | DMU18 |
| 20 | Ty | Yazoo Formation | Yazoo Formation | Eocene | Outer neritic to bathyal marine clay. Clay is calcareous and montmorillonitic, blue-green when unweathered. Sparingly fossiliferous, with marine mollusk shell hash common along partings. Bentonite seams present. Limestone ledges occur in places. The Yazoo Formation is marked by the planktonic foraminifera Hantkenina alabamensis. The Yazoo Formation conformably overlies the Moodys Branch Formation. Total thickness is approximately 400 ft in mapping area. | 2-4-1-1 | DMU Unit 1 | Ty | Ty | 255,204,0 | None | OF0361 | Marine sediment, mostly fine-grained | High | DMU19 |
| 21 | Tmb | Moodys Branch Formation | Moodys Branch Formation | Eocene | The Moodys Branch Formation is the basal member of a marine transgression towards the close of the Eocene epoch in the northern Gulf, situated unconformably above the deltaic to estuarine Cockfield Formation and conformably below the outer neritic to bathyal clays of the Yazoo Formation. It consists of sandy, fossiliferous marl containing abundant marine mollusk shells of the genera Glycymeris and Venericardia. The unit unconformably overlies the Cockfield Formation, reflecting the delta destructional phase and subsequent marine transgression, and it conformably grades upward into the Yazoo Formation. Total thickness is approximately 15 ft. | 2-4-1-2 | DMU Unit 1 | Tmb | Tmb | 171,107,79 | None | OF0361 | Marine sediment, mostly fine-grained | High | DMU20 |
| 22 | None | Claiborne Group | None | None | None | 2-4-2 | DMU-Heading3 | None | None | None | None | OF0361 | None | None | DMU21 |
| 23 | Tco | Cockfield Formation | Cockfield Formation | Eocene | Deltaic to estuarine deposits dominated by clays in the upper portions of the formation and sands in the lower portion. Clays are gray to brown in color, silty to fine sandy, plastic, highly carbonaceous with thin beds of lignite common, slightly micaceous, and locally pyritic. Sands are quartzose, cross bedded to massive, locally lignitic, and can be silty to clayey. The unit conformably overlies the Cook Mountain Formation. Thickness is approximately 250 ft in mapping area. | 2-4-2-1 | DMU Unit 1 | Tco | Tco | 237,222,130 | None | OF0361 | Sandstone and mudstone | Medium | DMU22 |
| 24 | Tcm | Cook Mountain Formation | Cook Mountain Formation | Eocene | Marine clays, silts, and sands. Clay, chocolate brown in color. Silt, dark yellowish-brown, carbonaceous, clayey, glauconitic, micaceous, sandy. Sand, light-gray to grayish-brown, fine- to coarse-grained, quartzose, fossiliferous, silty, clayey, micaceous, carbonaceous; shaley in upper portions, cross bedded in lower portions. Unconformably overlies the Kosciusko Formation. Thickness is approximately 60 ft. | 2-4-2-2 | DMU Unit 1 | Tcm | Tcm | None | None | OF0361 | Marine sediment, mostly fine-grained | Medium | DMU23 |
| 25 | Tk | Kosciusko Formation | Kosciusko Formation | Eocene | Sand, gray to light olive gray, massive to cross bedded, very fine- to very coarse-grained, quartzose, micaceous, locally exhibits scattered weak ledges of limonitic sandstone; interbedded to interlaminated with silt and clay, light olive gray to brownish gray, locally carbonaceous. Locally unconformable at base. Total thickness not represented in cross section. Constitutes the Sparta Aquifer. | 2-4-2-3 | DMU Unit 1 | Tk | Tk | None | None | OF0361 | Mostly sandstone | Medium | DMU24 |