Marcia Bjornerud Quotes

To my surprise, I found that geology demanded a type of whole-brain thinking I hadn't encountered before. It creatively appropriated ideas from physics and chemistry for the investigation of unruly volcanoes and oceans and ice sheets, It applied scholarly habits one associates with the study of literature and the arts - the practice of close reading, sensitivity to allusion and analogy, capacity for spatial visualization - to the examination of rocks. Its particular form of inferential logic demanded mental versatility and a vigorous but disciplined imagination. And its explanatory power was vast; it was nothing less than the etymology of the world.

With each integer on the Richter scale, there is a tenfold increase in the number of earthquakes that occur annually. On average, there is one magnitude 8 event, ten magnitude 7 events, a hundred magnitude 6 events, and so on, each year. If we consider this from an energy standpoint, the smaller earthquakes account for a significant fraction of the total seismic energy released each year. The one million magnitude 2 events (which are too small to be felt except instrumentally) collectively release as much energy as does one magnitude 6 earthquake. Although the larger events are certainly more devastating from a human perspective, they are geologically no more important than the myriad less newsworthy small ones.

Little by little, over more than two centuries, the local stories told by rocks in all parts of the world have been stitched together into a great global tapestry - the geologic timescale. This "map" of Deep Time represents one of the great intellectual achievements of humanity, arduously constructed by stratigraphers, paleontologists, geochemists, and geochronologists from many cultures and faiths. It is still a work in progress to which details are constantly being added and finer and finer calibrations being made.

Over human timescales, however, our disruption of geography will haunt us. Soil lost to erosion, coastal areas claimed by the sea, and mountaintops sacrificed on the altar of capitalism won't be restored in our lifetime. And these alterations will set in motion a cascade of side effects--hydrologic, biological, social, economic, and political--that will define the human agenda for centuries.

More pervasive and corrosive are the nearly invisible forms of time denial that are built into the very infrastructure of our society. For example, in the logic of economics, in which labor productivity must always increase to justify higher wages, professions centered on tasks that simply take time - education, nursing, or art performance - constitute a problem because they cannot be made significantly more efficient.

A retrospective of how scientific perceptions of the Earth have changed over the past three centuries reveals a strong correlation between Western political and social views and contemporary scientific "truths." This connection should make us suspect that our understanding of the planet at any historical moment is at best incomplete and at worst hopelessly wrapped up with our own self-image.

According to pioneering microbiologist Lynn Margulis, "fully 10 percent of our own dry body weight consists of bacteria, some of which, although they are not a congenital part of our bodies, we can't live without." In fact, a healthy human body has more bacterial cells than animal cells (bacterial cells are far smaller). Our own bodies are in some ways microcosms of the biosphere as a whole.

Antipathy toward time clouds personal and collective thinking.