Table 2 Results of the speed analysis for La Torre 6A and 6B trackways.
From:Fast-running theropods tracks from the Early Cretaceous of La Rioja, Spain
La Torre 6A | La Torre 6B | |
|---|---|---|
Footprint length (cm)a | 32.8 ± 3.1 | 28.9 ± 1.3 |
Average stride length (m) | 5.23 | 5.57 |
λ/h ratiob | 3.6–4.4 | 4.6–5.0 |
Mean speed (m s−1) | 6.5–10.3 [8.2–9.0] | 8.8–12.4 [10.5–11.6] |
Mean speed (km h−1) | 23.3–36.9 [29.4–32.5] | 31.6–44.7 [37.8–41.9] |
- The footprint and mean stride lengths used in the calculations are indicated. The full ranges of speeds take into account uncertainties in footprint length (and hence in hip height) and the ± 12% uncertainty associated with Eq. (1); the lower and higher values (in the bracketed ranges) were calculated, respectively, from Eq. (1) and Alexander’s equation.
- aCalculated from footprint measurements without question marks in Table1.
- bh is equal to 4 times the footprint length; the λ/h ratio is given as a range.
