How to Read a Mineral Rights Legal Description: A PLSS Guide for First-Time Buyers

You inherited a stack of paperwork from a relative. Or you bought a piece of land in Oklahoma and the closing packet mentions "mineral estate" three times. Either way, a document has landed in front of you that describes property not by street address, but by something like this:

T5N R6W Sec 22 NW¼ NE¼, Indian Meridian

That is a mineral rights legal description in Public Land Survey System (PLSS) format. It tells you exactly which 40-acre chunk of ground the deed covers, down to which corner of a specific one-mile-square section. Once you can read it, the rest of the paperwork stops feeling like code.

This guide walks a first-time mineral buyer or inheritor through how to parse a PLSS mineral rights legal description. It does not replace a landman or title attorney (they handle the ownership and title-chain questions this article intentionally leaves alone), but it will get you from "what does this mean" to "here is the parcel on a map" in a few minutes.

Two owners, one parcel: surface rights and mineral rights

In most PLSS states, land ownership can split into two estates:

• The surface estate: the ground, buildings, crops, water at the surface, roads.
• The mineral estate: everything underneath, including oil, gas, coal, and (depending on the state and the deed) hard-rock minerals.

Those two estates can be owned by two different people. Your grandmother may have sold the surface in 1974 but retained the minerals. A landowner in Wyoming may hold 640 acres of surface but only 25% of the minerals under it. When a mineral deed changes hands, the paperwork usually describes only the mineral portion, using the same PLSS grid the surface deed used, but often with a different aliquot part.

This is called split estate, and it is common across every producing state. The BLM's Energy pack write-up on split-estate identification and offset-operator analysis explains why it matters the moment a well shows up next door.

Practical consequence: two deeds on the same section can describe two very different tracts. Reading each PLSS description carefully is how you tell them apart.

Anatomy of a mineral rights PLSS description

Take the example from the top of this guide:

T5N R6W Sec 22 NW¼ NE¼, Indian Meridian

Five components:

• T5N: Township 5 North. Townships are 6-mile-wide horizontal rows numbered north or south of a baseline.
• R6W: Range 6 West. Ranges are 6-mile-wide vertical columns numbered east or west of a principal meridian.
• Sec 22: Section 22. Each township is divided into 36 sections, each roughly one square mile (640 acres). Section 22 sits in the second row from the top, third column from the left of a standard township grid.
• NW¼ NE¼: The aliquot part. This is the specific piece of the section the deed covers. How to read it is the next section.
• Indian Meridian: The principal meridian, which is the reference line for the range count. In this case, it points to Oklahoma.

Any PLSS legal description you encounter will carry those five pieces. If one is missing (a common problem on older typewritten deeds), you cannot pin the parcel unambiguously, and that is where a professional review starts to pay for itself.

Reading aliquot parts right to left

Aliquot parts are how a PLSS section gets subdivided. A section is 640 acres. Cut it into quarters and each is 160 acres. Cut a quarter into quarters and each is 40 acres. Cut a 40 into quarters and each is 10 acres. Mineral rights descriptions live in this zoom range.

The rule that trips up first-time readers: read aliquot parts right to left.

Take NW¼ SE¼ Sec 14. The instinct is to read it left to right: "northwest quarter, then southeast quarter." That is backwards.

Read it right to left:

1. Start with Sec 14 (640 acres).
2. Take the SE¼ of Section 14 (160 acres, the southeast quarter).
3. Take the NW¼ of that southeast quarter (40 acres, the northwest corner of the southeast quarter).

So NW¼ SE¼ Sec 14 = 40 acres, not 160, and not the whole section. Read it left to right and you end up looking at the wrong tract on the map.

The pattern extends. You will see descriptions like NE¼ NW¼ SW¼ Sec 22 (10 acres) or S½ NE¼ Sec 8 (80 acres, the south half of the northeast quarter). Same rule: right to left. Township America keeps a compact reference on aliquot parts that shows the standard subdivisions with their acreages.

One more wrinkle: some deeds use fractions of a section (S½, N½, W½, E½). Half sections are 320 acres. When you mix fractions and quarters (like S½ NE¼), you still read right to left.

The state and the meridian tell you where to look

Mineral rights activity is concentrated in a handful of PLSS states. The principal meridian on the deed is a fast way to identify which state (or which corner of a state) the parcel sits in.

• Oklahoma: Indian Meridian covers the majority of the state. Oklahoma has one of the deepest split-estate histories in the country, and mineral deeds here almost always cite the Indian Meridian.
• North Dakota: 5th Principal Meridian covers virtually the entire state, including the Bakken counties (McKenzie, Williams, Mountrail, Dunn).
• Wyoming: 6th Principal Meridian covers most of the state. Powder River Basin and Wind River Basin mineral deeds cite it.
• Colorado: 6th Principal Meridian and New Mexico Principal Meridian both appear, depending on which side of the state the parcel sits on. The Denver-Julesburg (D-J) Basin sits in the 6th PM area.
• Montana: Montana Principal Meridian. Township numbering starts fresh at the state line, so a T25N in Montana is not the same latitude as a T25N in North Dakota.

If the meridian on your deed does not match the state you think the parcel is in, that is a signal to double-check the paperwork before you do anything else. Meridian errors on old mineral deeds are common, and the state-specific converters (for example, the Oklahoma PLSS converter) reject an obviously mismatched combination rather than silently mapping it to the wrong parcel.

Looking up your description with Township America

Once you can read the components, plotting them on a map takes seconds:

1. Open the Township America PLSS converter. The search box accepts a full legal description or the individual pieces.
2. Type or paste the description exactly as it appears on the deed: T5N R6W Sec 22 NW¼ NE¼, Indian Meridian.
3. Township America returns the latitude/longitude for the tract, plots the parcel outline on the map, and shows the acreage, section number, and county.
4. Switch to satellite imagery (available on Pro at $20/mo) to see what is actually on the ground: farmland, a well pad, a stock pond, timber.

For a single mineral deed, Starter at $10/mo (100 searches per month, PLSS lookup, street map, county overlay) is enough. If you are working through an inherited stack with dozens of tracts across several states, Pro at $20/mo opens unlimited searches, HD satellite imagery, and PDF export so you can attach a labeled parcel map to your records. Title examiners handling split-estate parcels across a team lean on Business at $40/user/mo for CSV upload, structured exports (CSV, KML, Shapefile, GeoJSON, DXF), and MCP integration with title software.

What the map will not tell you

Township America shows you where the tract sits, how big it is, what county it is in, and (with the Energy data pack on Pro or Business at $150/mo) which wells are producing nearby. That is the geometry answer.

It does not answer the ownership questions, and those are the ones a first-time mineral buyer usually cares about most:

• Who currently owns the mineral estate on this specific 40 acres, and what fraction do they own?
• Has the mineral estate been leased? To whom, for how long, and at what royalty?
• Are there gaps in the title chain (uncontacted heirs, missing probates, unrecorded assignments)?
• Does a formal title opinion cover this tract?

Those are questions for a landman (for title research and lease status) or a title attorney (for a formal title opinion, and for any tax or estate-planning question that touches the deed). The paperwork you receive from a landman typically starts with the same PLSS legal description this guide taught you to read, so the reading skill is a foundation for that conversation, not a replacement for it.

Practical takeaway

A mineral rights legal description in PLSS format is a compact address for a specific piece of ground. The steps to read one:

1. Identify the five components: township, range, section, aliquot part, principal meridian.
2. Read the aliquot parts right to left to get to the actual tract and its acreage.
3. Confirm the principal meridian matches the state the deed is supposed to describe.
4. Plot the description in Township America to see the parcel on the map and confirm acreage and county.
5. If the tract matters to you (an inheritance, a purchase, a lease decision), take the labeled map to a landman or title attorney and let them run the ownership side.

The paperwork gets a lot easier once the description on the deed is a shape on a map instead of a string of letters and numbers.