GET defs/intervals
Summary: Get time interval definitions
Operation ID: getIntervals
Auth: unknown
Operation ID: getIntervals
Auth: unknown
Description
Returns all time interval definitions (geologic time periods) from the International Chronostratigraphic Chart.
Parameters (9)
age
(number, query, optional)
Numerical age in millions of years before present (Ma)
all
(boolean, query, optional)
Return all results
b_age
(number, query, optional)
Early age (older bound) in Ma
format
(string, query, optional)
Desired output format (json, csv, geojson, geojson_bare, topojson, topojson_bare)
Constraints: {'enum': ['json', 'csv', 'geojson', 'geojson_bare', 'topojson', 'topojson_bare']}
int_id
(integer, query, optional)
A chronostratigraphic time interval ID from /defs/intervals
interval_name
(string, query, optional)
Chronostratigraphic time interval name (e.g., Permian, Cretaceous)
t_age
(number, query, optional)
Late age (younger bound) in Ma
timescale
(string, query, optional)
A valid timescale name as defined in /defs/timescales
timescale_id
(integer, query, optional)
A valid timescale ID
Examples (3)
| Title | Type | URL | Action |
|---|---|---|---|
| Get all geologic intervals | curl |
https://macrostrat.org/defs/intervals?all=true |
|
| Search by interval name (Cretaceous) | curl |
https://macrostrat.org/defs/intervals?interval_name=Cretaceous |
|
| Find interval by age (100 Ma) | curl |
https://macrostrat.org/defs/intervals?age=100 |
Probe History
Status Codes
| Time | Status | Latency | Size |
|---|---|---|---|
| 2026-03-23 10:37:10.051548 | 404 | 385ms | |
| 2026-03-23 09:38:28.147238 | 404 | 390ms | |
| 2026-03-23 09:34:13.877026 | 404 | 396ms |