Mars geology and field science
This course develops a capability that was still missing from the core curriculum. It starts from concepts and units, builds the necessary calculations, then connects each method to real Mars engineering decisions.
Mastery objectives
- explain quantities, units and assumptions
- repeat at least one calculation by hand
- identify uncertainty, limits and failure modes
- turn the result into a decision for a Mars architecture
1. Read a landscape as a history
Field geology studies relationships: what lies above, below, cuts, displaces or erodes something else. A sample without context gives composition; a sample tied to its unit and landscape gives history.
Human crews can move faster than rovers, but speed becomes a scientific risk if context is not recorded.
Engineering reflex. Identify what is measured, assumed and calculated, then state what would change the decision.
2. Stratigraphy before absolute age
Superposition usually places younger layers above older ones in an undisturbed sequence. Cross-cutting relations, faults, intrusions and craters build a relative timeline.
Absolute ages require a dating method and assumptions about geochemical closure.
Engineering reflex. Identify what is measured, assumed and calculated, then state what would change the decision.
3. Volcanism, impacts, water and wind
Mars preserves volcanic terrains, craters, valleys and sediments. Each process leaves different geometries and textures.
Earth analogs help recognise processes but Mars has different gravity, pressure and climate history.
Engineering reflex. Identify what is measured, assumed and calculated, then state what would change the decision.
4. Mapping and traverses
A scientific traverse connects objectives, stops, time, safety, return margin and sample priorities. Crews prepare hypotheses before leaving and update them in the field.
NASA trains astronauts in geology because human observation can reformulate a question quickly, but every change must be documented.
Engineering reflex. Identify what is measured, assumed and calculated, then state what would change the decision.
5. Sample chain of custody
A valuable sample stays linked to location, orientation, geologic unit, pre-sampling imagery and storage history.
A Mars base must separate scientific, industrial and biological-control samples because each requires different contamination rules.
Engineering reflex. Identify what is measured, assumed and calculated, then state what would change the decision.
Worked example step by step
Build a nominal case and a degraded variant. Write every input with units, convert to one coherent system, perform the calculation, then translate the result into a sentence. Finally vary the most uncertain parameter by ±20% and check whether the decision changes.
Progressive exercise
- Choose a Mars subsystem and list five inputs.
- Classify each input: measured, sourced, assumed or calculated.
- Calculate the nominal case.
- Inject uncertainty or a failure.
- Decide: continue, degrade, stop or reconfigure.
Reasoned solution
A good solution shows units, reasoning, sensitivity and the decision. A numerical result without physical interpretation is not a complete solution.
Validation mini-project
Produce a three-to-five-page engineering note with need, assumptions, diagram, calculation, uncertainty, injected failure, decision criterion and at least three primary sources.