6 
CONTENTS. 
CHAPTER V. 
Santa Margarita valley. 
Extent and limits of the valley.—Its beauty and fertility.—Geological structure.—Character of the granite..—Disturbed 
rocks.—Trap protrusions..—Stratified rocks of the valley.—Order of position and nature of the beds.—Nature of the 
fossils included.—Relative position of the fossils in the four beds.—Relation of position of the beds of this valley with 
those in the Salinas valley.—Summary of the observations on the valley. 
CHAPTER VI. 
Point Pinos'mountains and Sierra San Jose. 
Great extent of the range.—Different names.—Height.—Mineral structure at Point Pinos..—Relation of the serpentine to 
the granite.—Gold washing at San Antonio.—Sandstones at San Miguel mission..—Position of stratified beds in Salinas 
valley slope of this range.—Structure of the chain from west to east.—Strata along the slope in Santa Margarita valley.— 
Height and direction of the San Josd range.—Geological structure of.—Mineral character of the granites.—Sedimentary 
beds of.—Diagram of geological sections.—Thickness of the strata.—Position and character of the green conglomerates.— 
Relation of these to the fossiliferous beds, both of this range and elsewhere in the south of the State. 
CHAPTER YII. 
Santa Maria river and Guyama valley. 
The Santa Maria river.—Its length and direction.—Local ignorance of.—Effects of its passage through the Santa Lucia 
hills.—Limits of the river valley.—Character of the country between the upper waters of the Santa Maria and Tulare 
valley.—Porphyritic hills of Estero plain.—Nature of the plain.—Strata on the east side of Cuyama valley.—Gypsiferous 
sandstones.—West side of the valley.—Brown sandstones.—Structure of the Cuyama valley.—Terraces of.—Central islet.— 
Traces of denudation and litoral action.—Relative and absolute height of the terrace levels. 
CHAPTER VIII. 
Santa Lucia mountains. 
Classification of the range.—Peculiarity of the range in its axial rocks.—Absence of true granitic rock.—General elevation, 
increased height toward the south.—Different level of the valleys east and west of this range.—Due to the width of the 
San Jose' granite.—Serpentine and trap containing calcite.—Tufaceous deposit.—Metamorphic limestone.—Nature of the 
changes which elevated this range.—San Luis pass.—Volcanic rock occurring in.—Canon of the Santa Maria.—Geological 
structure in.—Disposition of the mountain chain in lesser ridges.—Age of the sedimentary beds.—Are there palaeozoic 
beds in this range ? 
CHAPTER IX. 
Valley of San Luis Obispo. 
Topography of the valley slope and direction of the strata.—Effect of the disposition of the ranges upon the coast line and 
upon the climate.—Drainage of the valley.—Structure of the coast hills.—Number of the beds included under the 
asphalte group.—Polythalamous beds.—Fossils of the group.—Probable geological age of this series.—Relation of positioi 
to the Santa Margarita valley.—Position of the group on Santa Maria river.—Geographical extent.—Variety in dip.— 
Alteration in beds subsequent to deposition.—Denudation.—Character of the valley proper. 
CHAPTER X. 
Santa Barbara mountains. 
Situation and extent of this range. —Absence of primary rock.—Repetition of upheavals.—Secondary axes, their number 
and position.—Eastern limit of the range at San Buenaventura river.—Erroneous views put forth by recent writers.—The 
Santa Barbara mountains much more recent than San Bernardino.—Different position of the axes of this chain from that 
of the other coast ranges.—Granite of Matilihah.—Volcanic rocks of he chain.—Amphibole and felspathic.—Position of the 
