---
title: "Information required for a stratigraphic index"
slug: schichtenverzeichnis
legacy:
  type: help
  code: EUSVLR
links:
  related:
    - ALL95X
    - QLENWC
    - GTZXVZ
    - ZC4MG5
  glossary:
    - 23Z2VY
lang: en
source:
  origin_lang: de
  origin_file: 02_product/de/help/EUSVLR_schichtenverzeichnis.md
  origin_hash:
    algorithm: sha256
    value: D1EB3964435EB11FED512F3EE92D17D3DDF862839294EA4BE5A8D87928904E27
translation:
  target_lang: en
  generated_at: "2026-07-15T12:01:13.582745312Z"
---


# Information required for a stratigraphic index

![borehole profile with layers](/assets/img/samples/de_bohrprofil_schichten.png)
![Overview showing stratigraphic index and other borehole-related areas](/assets/img/screenshots/en_drillsite_demo01_list_of_layers_part01.png)
![stratigraphic index with depths and material sequences](/assets/img/screenshots/de_drillsite_demo01_list_of_layers_part02.png)
![Editing a single soil layer](/assets/img/screenshots/de_drillsite_demo01_list_of_layers_part03.png)
![Selecting a material for a soil layer](/assets/img/screenshots/de_drillsite_demo01_list_of_layers_part04.png)

The **stratigraphic index** is generated from the geological data of a single borehole. To ensure that a meaningful stratigraphic index can be created, the layers must be structured along the borehole depth and recorded as completely as possible.

In the stratigraphic index, you should in particular maintain:

- the depth intervals of the individual layers
- the soil or rock types for each layer
- material properties such as consistency, bulk density or moisture content
- additional characteristics such as colour, lime content or other geological indications
- where applicable, supplementary information on samples, anomalies or special features

The quality of the stratigraphic record depends heavily on whether the layers are recorded in a **structured** format rather than simply as free text. Structured layer data also form an important basis for further documents and analyses in BoreDoc.

The data from stratigraphic index is used in particular for:

- **Drilling profiles** for the graphical representation of the subsurface
- **Geological cross-sections** to link multiple boreholes
- **Calculations in accordance with VDI 4640**, provided that thermal extraction rates per layer are maintained
- Further geological analyses requiring a traceable sequence of layers

Notes on data maintenance:

- Record the layers in their actual sequence along the borehole depth.
- Ensure that the depth intervals are complete and consistent.
- Use structured data entries where available.
- Free text may be useful as a supplement, but does not replace a structured layer description.
- For geothermal boreholes, also check whether the specific heat extraction rate should be maintained for each layer.

If you wish to maintain the general borehole data first, please refer to the help text **Borehole Master Data**. For subsequent outputs based on this, the following are particularly relevant: **borehole profile**, **geological cross-section** and **Calculation in accordance with VDI 4640** are particularly relevant.