Vertical Motion of the Sunda Shelf with Reliability-Weighted Rates

93 point observations of vertical motion rates, compiled from 13 published sources, were harmonized and interpolated to create raster surfaces for the Sunda Shelf. The dataset, created by Nina de Munck, includes a structural geology framework and two alternative motion scenarios. It was last updated on 2026-05-28.

Use Cases

• Modeling long-term vertical land motion across tectonic boundaries based on the compiled point observations and structural framework.
• Assessing the reliability of geological rate estimates based on the four-category Reliability Index assigned to each data point.
• Comparing alternative subsidence scenarios (general subsidence vs. stability) for the Sunda Shelf based on the provided GeoTIFF rasters.
• Analyzing spatial patterns of vertical motion within defined geological zones like sedimentary basins and volcanic arcs.

Strengths

• 93 georeferenced point observations with recalculated common units (mm/y).
• Each observation includes a weighted reliability score based on four methodological criteria.
• Interpolation uses a kernel method with tectonic barriers to respect geological boundaries.
• Provides a structural framework including faults, trenches, and basin polygons.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data coverage is focused on the Sunda Shelf; applicability to other regions is limited.
• The dataset combines proxy data from wells and corals, which may have inherent methodological biases.

Provenance

Source

Compiled from 13 published sources, including petrochemical exploration wells and fossil coral proxies.

Collection Method

Data harmonization, reliability scoring, and geospatial interpolation using ArcGIS Pro.

Time Range

Neogene to Late Pleistocene–Holocene timescales.

Freshness

Last updated 2026-05-28 15:51:22; freshness should be verified.

Geography

Sunda Shelf region.