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Table 1 Study site coordinates and rock type/s. Measures of relative rock hardness, surface friability, and wave exposure (SE slope) are also included (see footnotes for description and “Study Area” section for methods)

From: Does rock type account for variation in mussel attachment strength? A test with Brachidontes rodriguezii in the southwestern Atlantic

Site Latitude (S) Longitude (W) Rock type Hardnessa Friabilityb SE slopec
Atlántida 37°51′06″ 57°30′21″ PL 0.05 6.56 0.73
Frente Mar 37°51′30″ 57°30′32″ PL/OO(I) 005/0.67 7.73 0.71
Playa Dorada 37°52′18″ 57°30′53″ PL 0.07 4.53 0.72
Camet 37°56′04″ 57°31′52″ PL 0.04 8.89 0.63
Punta Iglesia 37°59′48″ 57°32′27″ OO 0.67 0.48 1.7
Playa Chica 38°01′16″ 57°31′38″ OO 0.57 0.92 2.02
Punta Cantera 38°04′51″ 57°32′08″ OO 0.67 0.84 1.06
Faro Punta Mogotes 38°05′36″ 57°32′28″ OO 0.8 0.95 1.7
Los Acantilados 38°07′28″ 57°35′56″ PL 0.03 1.41 0.81
Chapadmalal 38°11′02″ 57°39′14″ PL/OO(I) 0.07/0.67 6.87 0.74
Las Brusquitas 38°14′43″ 57°46′33″ PL 0.04 8.17 0.79
Copacabana 38°14′50″ 57°46′50″ PL/OO(I) 0.05/0.57 7.14 0.79
Punta Hermengo 38°17′14″ 57°50′12″ PL 0.09 3.79 1.11
Rocas Negras 38°21′53″ 58°01′16″ PL 0.15 2.27 1.01
  1. PL, Pliocene–pleistocene loess cemented by calcium carbonate; OO, Ordovicic orthoquartzite; OO(I), human-introduced Ordovicic Orthoquartize (groins and revetments)
  2. aInverse of the mean depth (mm) of 4 replicate holes (4 mm diameter) drilled during 30 s with a power drill [42]
  3. bWeight per area unit (mg cm−2) of particles detached from the rock surface by three squared, ca. 5 cm side pieces of duct tape
  4. cMean slope (%) from the sampling point to the 5 m isobath in the Southeast direction (the average direction of strong swells) estimated from nautical charts